SANITARY WORK



SANITARY WORK

11.1. SPECIFICATIONS FOR APPLIANCES AND FITTINGS

11.1.0 Vitreous sanitary appliances (Vitreous China) shall conform to IS: 2556-1994 (Part–I) general requirements. (Fig.1).

The chromium plating shall conform to IS: 4827-1983 and shall be of grade 2 (thickness 10 micron).  The chromium plating shall never be deposited on brass unless a heavy coating of nickle is interposed.  In case these are required to be nickle plated, the plating shall be of first quality with a good thick deposit of silvery whiteness capable of taking high polish which will not easily tarnish or scale.  In finish and appearance the plated articles when inspected shall be free from plating defects such as blisters, pits, roughness and unplated areas and shall not be stained or discoloured.  Before fitting is plated the washer plate shall be removed from the fitting.  The gland packing shall be protected from the plating solution.

11.1.1 Bath tub (Enameled sheet steel) (Fig. 2) - The bath tub shall conform to IS: 3489-1985.  In Fig. 2 pattern 1 and 2 are shown as an indication of the dimensions only and do not purport to fix the details of the design.  The bath tub shall be constructed of the fewest practicable number of sections compatible with the manufacturing practice which shall be such as to ensure a suitable finished surface for the reception of the enamel coating.  Any welded surface shall be adequately cleaned off inside and outside the bath tub.  The necessary surface shall be free from undulations, drawing lines and other defects deleterious to the provision of a satisfactory enamel coating.

The interiors of the bath tub shall be adequately and evenly coated with vitreous enamel.  The enamelling shall conform to IS: 772-1973.  Thickness of the enamel shall not be less than 0.2 mm and not more than 0.5 mm.  External surface of the bath tub shall be given one ground or primer enamel coating.  Gloss, colour and capacity shall be uniform and visually satisfactory.

A bath tub shall be liable to rejection if the finish shows any of the following defects:

  1. Crazing (not to be confused with mechanical scratching, which will exhibit an irregular edge under a magnifying glass).
  2. Dimples, Rundown Sagging – Unless not readily attracting attention when viewed from normal eye level under natural light.
  3. Blisters – Not more than two in number on the interior surface shall be permitted provided they cannot be broken by a pressure of a finger nail.
  4. Pinholes – Pinholes not more than two in number for coloured bath tubs and not more than four for white enameled bath tube shall be permissible.  There shall be no grouping of pinholes and they shall not penetrate to the metal.

Fig. 1 Pipe systems and Parts

Fig. 2 Bath tub

  1. Specks – Specks shall be less than one millimetre in size and maximum five in number and there shall be no grouping.  Specks less than 0.25 mm in size shall not be treated as defect unless in sufficient number to form discolouration.

Warpage of edges set against wall or floor and edges of roll rims shall not exceed 5 mm/m. Warpage of all other edges shall not exceed 7.5 mm/m.

In forming the roll the outer edges shall be flanged or rolled back underneath sufficiently to prevent exposure of sharp edges.  The vertical height of the flanged or rolled edges shall be not more than 30 mm.  At the tap end of the roll, there shall be a level area within a radius of at least 25 mm from the centre of each tap hole.

For the safety of users, bath tubes shall be as flat bottomed as practicable.  The fall along the bottom head end to outlet shall be adequate for complete emptying. The waste hole shall be so formed as to be suitable for receiving a 40 mm waste fitting.  The bath tubs shall be provided at the tap end, with effective means of attaching an earth continuity conductor.  With each bath tub, two spacing washers of suitable thickness to take up the difference between the thickness of the metal of the bath tub and the depth of the seating on pillar taps shall be supplied.  In addition, two fibre or lead washers for each tap shall be supplied for fitting above and below the tap roll to prevent the enamel from crazing when the taps are tightened in position.

The maximum permissible variation from the dimensions specified in Fig. 2 shall be ± 4 percent  in all cases except overall width and overall length, where the variation shall not exceed ± 1 per cent.

Supports made of cast iron, mild steel or any other suitable material as specified shall be provided.

The support shall be non-adjustable type, as indicated in chain dotted lines in Fig. 2 for use on bath tubs without panels.  This shall include two sizes:

  1. For bath tubs to which a trap with 35 mm min. seal is to be fitted.
  2. For bath tubs to which a trap with 70 mm min.  seal is to be fitted.

11.1.2 Bath tub (Gel-coated glass fibre reinforced polyester resin) (Fig. 2) - Bath tub shall conform to IS: 6411-1985.  The fibre glass used in the manufacture of bath tubs shall be non alkaline conforming to ‘E’ type or ‘A’ type Grade.  The proportion of glass fibre shall not be less than 25 per cent of the glass fibre reinforced polyester layer including gel-coated layer.  Unsaturated polyester resin used in the manufacture of bath tubs shall be resistant to hot water and weathering.  When filler and colouring materials are used, their quality and proportion should be compatible to the polyester and the materials shall not have any harmful effect on the quality and performance of bath tubs.  The bath tub shall posses a uniform gel-coat on the working surface.  The resin used in the gel-coat shall be isophthalic grade of polyester or epoxy resin or any equally suitable chemical resistant grade of resin.  The gel-coat shall not be less than 0.25 mm thickness not more than 1.00 mm thickness.

Bath tub shall be one piece unit with an opening for waste outlet with floor sloping towards the outlet.  An overflow shall normally be provided on the side near the waste outlet.  An apron (side panel) may be provided integrally or separately with the bath tub.  The waste opening shall be suitable for the proper installation of waste fittings which are ordinarily used for the purpose.  The bath tub shall be provided with a supporting structure integral to the unit in between the space between the bottom of the bath tub and the floor of the building on which the bath tub rests, unless otherwise specified.  The materials of the supporting structures shall be atleast equal to the material of the bath rub in resistance to deterioration with age and shall meet the requirement of fungus and vermin.

In forming the roll, the outer edge shall be flanged or rolled back underneath sufficiently to prevent exposure of sharp edges. The vertical height of the flanged or rolled edges shall be not more than 30 mm.  At the tap end of the roll, there shall be a level area within a radius of atleast 25 mm from the centre of each tap hole.  For the safety of users, bath tube shall be as flat-bottomed as practicable.  The fall along the bottom head end to the outlet shall be adequate for complete emptying.  The waste hole shall be formed as to be suitable for receiving a 40 mm waste fitting.  Arrangement to attach an earth continuity conductor shall be provided at the tap end.  The bath tub shall be inspected for defects, as prescribed in Annexure 11-A.1.

11.1.3 Flushing cisterns (Fig. 3) - The flushing cisterns shall be automatic or manually operated, high level or low level as specified, for water closets and urinals. A high level cistern is intended to operate with minimum height of 125 cm and a low level cistern with a maximum height of 30 cm between the top of the pan and the under side of the cistern.

Cisterns shall be of cast iron, Vitreous China, Pressed steel (IS: 774-1984) for flushing type and IS: 2326 for Automatic Flushing Cistern and Plastic (IS: 7231-1984).

The thickness of the body including cover shall be not less than 5 mm & 6 mm for cast iron and vitreous China cisterns respectively.  The body of the pressed steel cistern shall be of seamless or welded construction.  The body and cover of the pressed steel cistern shall be of thickness not less than 1.6 mm and 1.3 mm respectively before coating & shall be vitreous enamelled or otherwise protected against corrosion by equally efficient coating.  The outlet of each syphon or stand pipe shall be securely connected  to the cistern by means of pipe shall be securely connected to the cistern by means of lock nut.  The cistern shall be free from manufacturing faults and other defects affecting their utility.  All working parts shall be designed to operate smoothly and efficiently.  Cistern shall be mosquito proof.  A cistern shall be considered mosquito proof only if there is no clearance any where which would permit a 1.6 mm wire to pass through in the permanent position of the cistern i.e., in the flushing position or filling position.

The breadth of a low level cistern, from front to back shall be such that the cover or seat,  or both, of water closet pans shall come to rest in a stable position when raised.

The cistern shall be supported on two cast iron brackets of size as approved by the engineer and embedded in cement concrete 1:2:4 block 100x75x150 mm.  The cast iron brackets shall conform to IS: 775-1970-1970.  These shall be properly protected by suitable impervious paint.  Alternatively the cisterns shall have two holes in the back side above the overflow level for screwing into the wall, supplemented by two cast iron wall supports.  A 5 litres cistern, however, may be supported by larger brackets cast on the body of the cistern.

The cistern shall have a removable cover which shall fit closely on it and be secured against displacement.  In designs where the operating mechanism is attached to the cover this may be made in two sections,  but the section supporting the mechanism shall be securely bolted or screwed to the body.  The outlet fitting of each cistern shall be securely connected to the cistern.  The nominal internal diamneter of cistern outlet shall be not less than 32 mm and 38 mm for high level and low level cisterns respectively.  The length of the outlet of the cistern shall be 37 ± 2 mm.

Ball valve shall be of screwed type 15 mm in diameter and shall conform to IS 1703-1989.  The float shall be made of Polyethylene as specified in IS 9762  (The design shall permit the cistern to fill in rapidly and close effectively when the level of water reaches and working water level).

In the case of high level manually operated cistern, the level arm of the cistern shall have a suitable hole near the end through which a split or a (S) hook shall pass. A chain shall be of G. I. and strong enough to sustain a suddenly applied pull of 10 Kg or a dead load of 50 Kg without any apparent or permanent deformation of the shape of the ring. The chain shall terminate in suitable handle or ‘Pull’ which shall be pottery, glavanised, iron, nonferrous metal or a moulding in any heat resisting and non absorbent plastic.  The finish shall be smooth and free from burrs.   In case of low level flushing cisterns, the handle shall be of a chromium plated brass.   The cast iron cisterns shall be painted with two coats or more coats bitumastic paint on the inside and two or more coats of paint of approved quality and shade on the outside.

Fig. 3 Flushing cisterns

In the case of manually operated cisterns the siphonic action of the flushing cistern shall be capable of being rapidly brought into action by the operating lever, but shall not self siphon or leak.  When tested according to IS 774 the discharge rate shall be 10 ± 0.5 litre in 6 seconds and 5 ± 0.5 litre in 3 seconds for cisterns of capacities 10 litre and 5 litre respectively.  The cisterns shall be so designed that there is not appreciable variation in the force of flush during the discharge capacity of 5 & 10 litres as specified.  When required to give a full flush, they shall respectively discharge 5 litres and 10 litres with variation of ± 0.5 litres.

The flush pipe shall be of (a) medium quality galvanised iron having internal diamter of 32 ± 1 mm for high level cistern and 38 ± 1 mm for low level cistern.  The flush pipe shall be of suitable length with bends etc. as required for fixing it with front or back inlet W. C. Pan.  (b) Polyethylene pipes low density conforming to IS: 3076-1985 or high density conforming to IS : 4894-1987 (c) Unplasticized  PVC pipes conforming to IS: 4895-1982.  For high density polyethylene and unplasticized PVC pipes, the outside diameter of the pipes shall be 40 mm.  When PVC plumbing pipes are used the outside diameter of the pipe shall be 40 mm or high level cisterns and 50 mm for low level cisterns.

In case of high  level cistern the flush pipe shall be a vertical pipe 125 cm long and having a nominal internal dia 32 ± 1 mm (except plastic flush pipe) and in case of low level cistern 30 cm long and 38 ± 1 mm diameter (except plastic flush pipes).

Over flow pipe
  1. GI overflow pipe shall be of not less than 20 mm nominal bore and shall incorporate a non corrodible mosquito proof brass cover having 1.25 mm dia perforation, screwed in a manner which will permit it to be readily cleaned or renewed when necessary.  No provision shall be made whereby the overflow from the cistern shall discharge directly into the water closet or soil pipe without being detected.
  2. The invert of the overflow pipe in the case of high level and low level cisterns shall be 19 mm minimum above the working water level.  In case of overflow due to any reason water should drain out through the over flow pipe and not through the siphon pipe.
  3. The plastic overflow pipes shall be manufactured from high density polyethylene conforming to IS: 4984-1995 or unplasticized PVC conforming to IS: 4985 - 1988.

Inlet and overflow holes - The cistern shall be provided with inlet and overflow holes, situated one at each end which shall be capable of accommodating an overflow pipe of not less than 20 mm nominal bore and a 15 mm size ball valve.  The holes shall be cleanly cast or drilled and the adjacent surfaces shall be smooth.

11.1.4 Specifications for draining board

Draining board manufactured stainless steel (Salem or Neelam or equivalent steel) conforming to IS: 13983 shall be provided.

Draining board made of Kota Stone or Marble Stone conforming to specifications and as per directions of engineer, duly rubbed and polished without groove shall be provided.  The draining board shall be provided with 15 mm thick back and side skirting.  The size of the board measured from outside of skirting shall be 75x45x2.5 cm, 60x45x2.5 cm or as specified.  The skirting measured from inside shall be 65 mm to 75 mm high with edges rounded off.  The entire surface including bottom of the board shall be finished smooth.

11.1.5 Specifications for foot rests (Fig. 4) 

Foot rests shall be of Vitreous China conforming to IS: 2556-1994. Foot rests which are rectangular shall meet the minimum requirements and dimensions shown in Fig. 4 and may be of different designs where so specified.  Foot rests of different shapes and sizes shall also be allowed subject to approval of engineer.

11.1.6 Specifications for glass shelf  

Glass Shelf shall consist of an assembly of glass shelf, with anodised aluminium angle frame to support the glass shelf.  The shelf shall be of glass of best quality with edges rounded off, and shall be of the shelf shall be 60x12 cm unless otherwise specified and thickness not less than 5.5 mm.  The shelf shall have C.P. brass brackets which shall be fixed with C.P. brass screws to rawl plugs firmly embedded in the walls.

PVC shelf as per manufacturer’s specifications and size as specified shall be provided.

11.1.7 Specifications FOR MIRROR 

The mirror shall be of superior sheet glass with edges rounded off or bevelled, as specified.  It shall be free from flaws, specks or bubbles.  The size of the mirror shall be 60 x 45 cm unless specified otherwise and its thickness shall not be less than 5.5 mm.  It shall be uniformly silver plated at the back and shall be free from silvering defects. Silvering shall have a protective uniform covering of red lead paint.  Where bevelled edge mirrors of 5.5 mm thickness are not available, fancy looking mirrors with PVC beading/border or aluminium beading or stainless steel beading / border based on manufacture’s specifications be provided nothing extra shall be paid on this account.  Backing of mirrors shall be provided with environmentally  friendly  material other than asbestos cement sheet.

Fig.4 Foot Rest

 Fig. 5 M.S. Stays and clamps

Table 1 Minimum finished weights of pillar taps

Particulars

Weights for

 

15 mm size gms.

20 mm size gms.

Body

255

505

Washer plate loose valve

15

28

Back nut

40

50

Tap

650

1175

11.1.8 Specifications for M. S. stays and clamps (Fig. 5) 

The clamps shall be made from 1.5 mm thick M. S. flat of 32 mm width, bent to the required shape and size to fit tightly on the socket, when tightened with nuts & bolts.  It shall be formed of two semicircular pieces with flanged ends on both sides with holes to fit in the screws, bolts and nuts 40 mm long.  The stay shall be minimum one metre long of 10 mm dia M. S. bar. One end of the stay shall be bent for embedding in the wall in cement concrete block of size 20 x 10 x 10 cm in 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size).  The concrete shall be finished to match with the surrounding surface.

11.1.9 Specifications for pillar taps 

Pillar taps shall be chromium plated brass and shall conform to IS: 1795-1982.  The nominal sizes of the pillar tap shall be 15 mm or 20 mm as specified.  The nominal size shall be designated by the nominal bore of the pipe outlet to which the tap is to be fitted.  Finished weights of 15 mm and 20 mm pillar taps shall be as prescribed in Table 1.

Casting shall be sound and free from laps, blow hole and pitting.  External and internal surfaces shall be clean, smooth and free from sand and be neatly dressed.  The body, bonnet and other parts shall be machined true so that when assembled, the parts shall be axial, parallel and cylindrical with surfaces smoothly finished.

The area of waterway through the body shall not be less than the area of the circle of diameter equal to the bore of the seating of the tap.  The seating of pillar tap shall be integral with the body and edges rounded to avoid cutting of washer.  Pillar taps shall be nickle chromium plated and thickness of coating shall not be less than service grade  No.2 of IS : 4827 - 1983 and plating shall be capable of taking high polish which shall not easily tarnish or scale.

Every pillar tap, complete with its component parts shall withstand an internally applied hydraulic pressure of 20 Kg/sq. cm maintained for a period of 2 minutes during which period it shall neither leak nor sweat.

11.1.10. Specifications for sand cast iron or centrifugally cast (Spun)

Iron pipes and fittings - Sand cast iron spigot and socket soil, waste and ventilating pipes, fittings and accessories shall conform to IS: 1729-1979.  Centrifugally cast (Spun) iron spigot and socket soil, waste and ventilating pipes, fittings and accessories shall conform to IS: 3989-1984.

The fittings shall conform to the same I. S. specifications to which the pipe itself conforms in which they are connected.

The pipes shall have spigot and socket ends, with head on spigot end in case of sand cast iron pipes and without head on spigot end in case iron (Spun) pipes.  The pipes and fittings shall be true to shape, smooth and cylindrical, their inner and outer surface being as nearly as practicable concentric. They shall be sound and other imperfections and shall be neatly dressed and carefully fettled.  All pipes and fittings shall ring clearly when struck with a light hand hammer.

The ends of pipes and fittings shall be reasonably square to their axis.  The sand cast iron pipes shall be 1.5/1.8/2.0 metre in length including socket ends, cast iron (Spun) pipes shall be 1.5/1.75/2.0/2.5/3.0 metre in length including socket ends, unless shorter lengths are either specified or required at junctions etc.  The pipe and fittings shall be supplied without ears, unless specified or directed otherwise.

All pipes and fittings shall be coated internally and externally with the same material at the factory, the fitting being preheated prior to total immersion in a bath containing a uniformly heated composition having a tar or other suitable base.  The coating material shall have good adherence and shall not scale off.  In all instances where the coating material has tar or similar base it shall be smooth and tenacious  and hard enough not to flow when exposed to a temperature of 77 degree centigrade  but not so brittle at a temperature at 0 degree centigrade as to chip off when scribed lightly with a pen knife.

The standard weights and thicknesses of pipes and their tolerances shall be as prescribed in Annexure 11-A.2.

The thickness of fittings and their socket and spigot dimensions shall conform to the thickness and dimensions specified for the corresponding sizes of straight pipes. The tolerance in weights & thicknesses shall be the same as for straight pipes.

The access door fittings shall be designed so as to avoid dead spaces in which filth may accumulate. Doors shall be provided with 3 mm rubber insertion packing and when closed and bolted, these shall be water tight.

Specifications for sand cast iron floor trap or nahani trap

Sand cast iron floor trap or Nahani trap shall be ‘P’ or ‘S’ type with minimum 50 mm seal. However, if the plumbing is in two pipe system and with a gully trap at the ground level the minimum water seal shall be 35 mm.  The traps shall be of self cleansing design and shall have exit of same size as that of waste pipe.  These shall conform to IS: 1729-1979.

11.1.11 Specifications for Plastic seat and covers for water closet (Fig. 6)

The seat and cover shall be of thermosetting or thermoplastic conforming to IS: 2548-1996 as specified.  Unless and otherwise specified these shall be of closed pattern.

Thermosetting plastic used shall conform to grade 2 or 3 of IS: 1300-1994 when it is phenolic or IS: 3389-1994 when of urea formaldehyde.

Thermoplastic  materials used may be of Polystyrene conforming to type 2 or 3 of IS : 2267-1995 or polypropylene (Annexure 11-A.1).  In public buildings where rough and heavy use of seats and covers are common, plastic seats shall be moulded out of thermosetting materials, phenolic or urea formaldehyde only and the under side of the seat shall be flat with solid moulding.

The hinging device shall be bronze or brass with nickel chromium plating confirming to IS : 2548-1996 and the seat shall have not less than three rubber or plastic buffers unless otherwise specified.  The cover shall be fitted with the same number of buffers as provided for the seat.

Seats shall have a smooth finish and shall be non absorptive and free from cracks and crevices. They shall be capable of being easily cleaned and shall not be adversely affected by common solvents or household cleanser.

 Fig. 6  - W.C. Seat and covers

Strength - The seats shall withstand without permanent distortions of the seat or hinge fittings and damage to any finish when a load of 1150 N for 30 minutes is applied in the manner prescribed in IS: 2548-1996.

Fig. 7(1-4) Sinks

Fig.7.2 Sinks

Fig. 7.3 – Sinks

Fig. 7(1-4)  - Sinks

11.1.12 Specifications for Sinks (Fig. 7)

Laboratory sinks shall be of white vitreous china with dimensions as specified conforming to IS: 2556-1994 (Part V).  Kitchen sink shall be of white glazed fire clay conforming to IS: 771-1985 (Part-II) and shall have combined overflow of the weir type and their inverts shall be 30 mm below the top edge.  These shall be of one piece construction.

The floor of the sink shall gently slope towards the outlet.  The outlet shall in all cases be suitable for waste fittings having flanges of 88 mm diameter and the waste hole shall have a  minimum diameter of 65 mm at the bottom to suit  the waste fittings. The waste hole shall be either rebated or beveled having a depth of 10 mm.  Each sink shall be provided with a non ferrous 50 mm dia waste filling.  The 50 mm long shank of the waste shall be threaded to the full length to the under side of flange in each case.

The waste fittings shall be of brass chromium plated. (Fig. 8)

The sink shall be provided with 40 mm CP brass or PVC union.  CI brackets for supporting sink shall conform to IS: 775-1970.

Wherever specified stainless steel kitchen sink of size as specified conforming to IS: 13983-1994 shall be provided.

11.1.13 Specifications for Towel rail

The towel rail shall be of:

a). CP Brass with two CP brass brackets coated with nickel chromium plating of thickness not less than grade no. 2 of IS: 4827-1983.

b). Anodised aluminium fluted surface with two anodised aluminium brackets.  The size of the rail shall be 75 cm x 20 mm dia or 60 cm x 20 mm dia, 1.25 mm thick as specified.  The fixing screw shall be of C. P. brass.

11.1.14 SPECIFICATIONS for Toilet paper holder

The toilet paper holder shall be of CP brass or vitreous china as specified and of size and design as approved by the Engineer.  It shall be fixed in position by means of C. P. brass screws and rawl plugs embedded in the wall.

11.1.15 Specifications for Urinals

11.1.15.1 Bowl type urinals (Fig. 9). - Urinal basins shall be of flat black or corner wall type lipped in front.  These shall be of white vitreous china conforming to IS: 2556-1994(Part VI) Sec. I. The urinals shall be of one piece construction.  Each urinal shall be provided with not less than two fixing holes of minimum dia 6.5 mm on each side.  Each urinal shall have an integral flushing rim of suitable type and inlet or supply horn for connecting the flush

Fig. 8 C.I. Brackets and waste fittings pipe.  The flushing rim and inlet shall be of the self draining type. It shall have a weep hole  at the flushing inlet of the urinals.

Fig. 9 Urinal bowl type

At the bottom of the urinal an outlet horn for connecting to an outlet pipe shall be provided.  The exterior of the outlet horn shall not be glazed and the surface shall be provided with grooves at right angles to the axis of the out let to facilitate fixing to the outlet pipe.  The inside surface of the urinal shall be uniform and smooth throughout to ensure efficient flushing.  The bottom of pan shall have sufficient slope from the front towards the outlet such that there is efficient draining.

The following tolerances may be allowed on the dimensions :

a) On dimensions 50 mm and over : ± 4 per cent

b) On dimensions less than 50 mm : ± 2 mm

c) On all angles : ± 3 degree

11.1.15.2 Stall urinals (Fig. 10) - The stall urinals and its screens shall be of white glazed fire clay conforming to IS: 771-1985 (Part 3-Sec. 2).  The stall shall be 1140 mm high and 460 mm wide with 400 mm overall depth at the base.  Where specified, screens which shall be 1200 mm high and 15 cm wide (overall) and projecting 50 cm after suitable embedment in the wall shall be provided as directed by the Engineer.  In case of a range of two or more urinals, there shall be further division screens as shown in Fig. 10.  The end screen shall also be suitably fixed as directed by the engineer. The range shall  have 15 cm deep standard pattern tread plates of fire clay or black granite as specified or otherwise directed by the Engineer. The inside surface of the stall and its screens shall be regular and smooth throughout to ensure efficient flushing.

11.1.15.3 Half stall urinals (Fig. 11) - They shall be of white vitreous China conforming to IS:  2556-1994(Part VI – Sec. 2).  They shall be of one piece construction with or without an integral flushing box rim and provided with slots or alternative fixing arrangement at the flat back end.  They shall be provided with ridges where integral flushing rim is not provided in the sides of the interior of the bowl, to divert the water towards the front line of the urinal where integral flushing box rim is specified, water spreaders provided shall conform to IS : 2556-1994 (Part VI Sec. 6) (Fig. 13).  These shall be vitreous China of one piece construction with integral flush inlet.

The tolerance of ± 4 per cent may be allowed on the dimensions specified.

11.1.15.4 Urinal partition slabs - Urinal Partition slabs shall be provided, as specified.

11.1.15.5 Squatting Plate Urinal (Fig. 12) - The plates shall be of white vitreous china conforming to IS: 2556-1994(Part I) and IS 2556-1994 (Part VI) (Section 3) with internal flushing rim with front or side inlet.  Squatting Plate shall be of one piece construction.  Each Urinal shall have integral longitudinal flushing pipe of suitable type which may be connected to flush pipe.  The following tolerances may be allowed on the dimensions:

a) On dimension 50 mm and over : ± 4 per cent

b) On dimensions less than 50 mm : ± 2 mm

These shall be 100 mm dia dry white glazed vitreous china channel with stop and outlet piece in front.

Fig. 10 Urinal - Stall

Fig. 11 – Urinal Half Stall

11.1.16 Specifications for Wash Basins (Fig. 14,15, 16, 17 & 18)

Wash Basins shall be of white vitreous china conforming to IS: 2556-1994(Part-I) and IS:  2556-1994(Part-IV) . Wash basins either of flat back or angle back as specified shall be of one piece construction, including a combined overflow.  All internal angles shall be designed so as to facilitate cleaning.  Each basin shall have a rim on all sides, except sides in contact with the walls and shall have a skirting at the back.  Basins shall be provided with single or double tap holes as specified.  The tap holes shall be 28 mm square or 30 mm round or 25 mm round for pop up hole.  A suitable tap hole button shall be supplied if one tap hole is not required in installation.  Each basin shall have circular waste hole to which the interior of basin shall drain.  The waste hole shall be either rebated or bevelled internally with diameter of  65 mm at top.  Each basin shall be provided with a nonferrous 32 mm waste fitting.  Stud slots to receive the brackets on the underside of the wash basin shall be suitable for a bracket with stud not exceeding 13 mm diameter, 5 mm high and 305 mm.

Fig. 12 Urinal squatting plate

from the back of basin to the centre of the stud.  The stud slots shall be of depth sufficient to take 5 mm stud.  Every basin shall have an integral soap holder recess or recesses, which shall fully drain into the bowl. A slot type of overflow having an area of not less than 5 sq. cm shall be provided and shall be so designed as to facilitate cleaning of the overflow.

Fig. 13 – Spreader for urinal

Where oval shape or round shape wash basins are required to be fixed these shall be fixed preferably in RCC platform with local available stone topping either fully sunk in stone top or top flush with the stone topping as directed by Engineer.

The wash basins shall be one of the following patterns and sizes as specified (Fig. 14).

a) Flat back :    630 x 450 mm

                         550 x 400 mm

                         450 x 300 mm

b) Angle back : 600 x 400 mm

                         400 x 400 mm

Fig. 15 Wash basins

White glazed pedestals for wash basins, where specified shall be provided.  The quality of the glazing of the pedestal shall be exactly the same as that of the basin along with which it is to be installed.  It shall be completely recessed at the back to accommodate supply and waste pipes and fittings.  It shall be capable of supporting the basin rigidly and adequately and shall be so designed as to make the height from the floor to top of the rim of basin 75 to 80 cm as shown in Fig. 14,15, 16, 17 & 18.  All the waste fittings shall be brass chromium plated, or as specified.  The following tolerances may be allowed on  dimensions specified :

Fig. 16 – Typ. Vertical section of wash basin (Waste pipe open to view)

Fig. 17 Typical Vertical section of wash basin

(Waste pipe concealed from view)

a) On dimension 75 mm and over : ± 4 per cent

b) On dimensions less than 75 mm : ± 2 mm

c) Diameter of the waste hole : +3 mm

Fig. 18 Angle back wash basin (Pattern-2)

11.1.17 Waste fittings for wash basins and sinks (Fig. 8) - The waste fittings shall be of nickel chromium plated brass, with thickness of plating not less than service grade 2 of IS : 4827-1983 which is capable of receiving polish and will not easily scale off.  The fitting shall conform in all respect to IS : 2963-1979 and shall be sound, free from laps, blow holes and pittings  and other manufacturing defects.  External and internal surfaces shall be clean and smooth.  They shall be neatly dressed and be truly machined so that the nut smoothly moves on the body.

Waste fitting for wash basins shall be of nominal size of 32 mm.  Waste fittings for sinks shall be of nominal size 50 mm.

11.1.18 Specifications for Water closet (Fig. 19, 20 & 21)

11.1.18.1 Squatting pans (Fig. 19 & 20) - Squatting pins shall be of white vitreous china conforming to IS: 2556-1994(Part I) for General requirements and relevant IS codes for each pattern as described below :

  1. Long pattern – conforming to IS: 2556-1994-1994 (Part-III).
  2. Orissa pattern – conforming to IS: 2556-1994-1994 (Part-III).
  3. Integrated type conforming to IS: 2556-1994-1994 (Part-XIV).

Preferably Orissa type pan should be used.

Each pan shall have an integral flushing rim of suitable type.  It shall also have an inlet or supply horn for connecting the flush pipes, as shown in Fig. 19, 20 & 21.  The flushing rim and inlet shall be of the self draining type.  It shall have weep hole at the flushing inlet to the pan.  The flushing inlet shall be in the front, unless otherwise specified or ordered by the Engineer.  The inside of the bottom of the pan shall have sufficient slope from the front towards the outlet and the surface shall be uniform and smooth to enable easy and quick disposal while flushing.  The exterior surface of the outlet below the flange shall be an unglazed surface which shall have grooves at right angles to the axis of the outlet.  In all cases a pan shall be provided with a (100 mm) S.C.I. trap ‘P’ or ‘S’ type with approximately 50 mm water seal and 50 mm dia vent horn, where required  by the engineer.

The following tolerances may be allowed on the dimensions specified :

1. Long pattern and Orissa pattern :

a) On dimension 50 mm and over :  ± 4 per cent

b) On dimensions less than 50 mm : ± 2 mm

c) On all angles : ± 3 deg.

  1. The top surface of long pattern pan shall not at any point vary from its designed plane or contour by more than 6 mm for size 580 mm and by more than 10 mm for sizes 630 mm and measured vertically.  This value shall not exceed 10 mm in case of Orissa pattern pans.

2. Integrated squatting pan :

a) On dimension 50 mm and over : ± 4 per cent

b) On dimensions less than 50 mm : ± 2 mm

c) On all angles : ± 3 deg.

11.1.18.2 Water closet (Wash down type) (Fig. 20 & 21) - Water closets shall be of white vitreous china conforming to IS: 2556-1994 (Part-I) and 2556-1994 (Part-II), as specified and shall be of “Wash down type”.  The closets shall be either of the two patterns (Pattern I & Pattern II) and sizes as shown in Fig. 20 & 21 as specified.  The closets shall be of one piece construction. Each water closet shall have not less than two holes having a minimum diameter of 6.5 mm for fixing to floor and shall have an integral flushing rim of suitable type.  It shall also have an inlet or supply horn for connecting the flushing pipe of dimensions conforming to ‘E’ in Table in Fig. 20 & 21 the flushing rim may be boxed or open type.  In the cast of box rims adequate number of holes, on each side together with a slot opposite the inlet shall be provided.  The flushing rim and inlet shall be of self draining type.  The water closet shall have a weep hole at the flushing inlet.  Each water closet shall have an integral trap with either ‘S’ or ‘P’ outlet with atleast 50 mm water seal.  For P trap, the slope of the outlet shall be of 14 deg. below the horizontal.  Where required the water closet shall have an anti-siphonage 50 mm dia vent horn on the outlet side of the trap with dimension conforming to those given in Fig. 21 and on either right or left hand or centre as specified set at an angle of 45 deg. and invert of vent hole not below the central line of the outlet.  The inside surface of water closets and traps shall be uniform and smooth in order to enable an efficient flush.  The serrated part of the outlet shall not be glazed externally.  The water closet when sealed at the bottom of the trap in line with the back plate, shall be capable of holding not less than 15 litres of water between the normal water level and the highest possible water level of the water closet as installed.

Fig. 19 Squatting pans

Fig. 20-1 Water closets

Fig. 20.2 – Water closets

Fig. 21 – Water closet

11.1.18.3 Dimensions and tolerances - The dimensions of pattern I and II shall confirm to those given in table in Fig. 20 and 21 respectively.  Where tolerances are not given for a specific dimension, the following shall be permissible.

a) On dimension 75 mm and over : ± 4 per cent

b) On dimensions less than 75 mm : ± 2 mm

c) On all angles : ± 3 deg.

11.2.  Specifications For Installation Of WC Pan

11.2.1 The work shall be carried out, complying in all respects with the requirements of relevant bye laws of the local body in whose jurisdiction of the work is situated.

11.2.2 Any damage caused to the building, or to electric, sanitary, water supply or other, installations etc. therein, either due to negligence on the part of the contractor, or due to actual requirements of the work, shall be made good and the building or the installation shall be restored to its original condition by the contractor.  Nothing extra shall be paid for such restoration works except where otherwise specified.

11.2.3 For making good the damage to the under mentioned items of work, the specifications as given in the following paras shall apply, unless directed otherwise.

a) Masonry work - The masonry work shall be made good by using the same class of bricks, tiles or stones as was damaged during the execution of the work. The mortar used shall be cement mortar 1:5 (1 cement : 5 fine sand) or as directed by the engineer.

b) Plain concrete works - Concrete work for sub-grade of the flooring, foundations and other plain concrete works shall be cement concrete 1:5:10 (1 cement : 5 coarse sand : 10 graded stone aggregate 40 mm nominal size).  A coat of neat cement slurry shall be applied at the junction with old work before laying fresh concrete.

c) Cement concrete flooring and R. C. C. works - Cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) shall be used after applying a coat of neat cement slurry at the junction with old work, and the surface finished to match with the surrounding surface.

d) Plastering - Cement plaster 1:4 (1 cement : 4 sand) shall be used.  The sand shall be fine or coarse, as used in the original work.  The surface shall be finished with two or more coats of white wash, colour wash, distemper or painting as required, but where the surface is not to be white washed, colour washed, distempered or painted, it shall be finished as required to match with the surrounding surface.

e) Other items - Damage to any other item shall be made good as directed by the Engineer.

Note - In all the above operations the damaged portion shall be cut in regular geometric shape and cleaned before making good the same.

11.2.4 All exposed G. I., C. I.  or lead pipes and fittings shall be painted with approved quality of paint and shade as specified.  The painting work shall conform to specification described under Painting in the Section on Finishing works.

11.2.5 All sanitary and plumbing work shall be carried out through licensed plumbers.

11.2.6 On completion of the work the site shall be cleaned and all rubbish disposed off as directed by the engineer.

11.2.7 Various sanitary fittings as described including fixing shall be enumerated individually or in combination under relevant items of works as described below.  When used in combination, specifications as described under relevant paras shall apply but nothing extra shall be paid for making connections, required for successful functioning of the combination.

11.3. Specifications For Installation Of Draining Board

11.3.1 Fixing - One end of the board shall rest on sink and the other end shall be supported on C. I. bracket embedded in cement concrete (1:2:4) block 100 x 75 x 150 mm. The brackets used shall be of cantilever type or wall fixed type as for the sink.

11.3.2 Painting - The brackets shall be painted with two or more coats of approved paint.

11.3.3 Measurements - Draining Board shall be enumerated in case payable separately.

11.3.4 Rate - The rate shall include the cost of all materials and labour involved in all operations.

11.4 Specifications for Installation Of Flushing Cistern

11.4.1 Fixing

11.4.1.1 High level cistern - The cistern shall be fixed on C. I. cantilever brackets which shall be firmly embedded in the wall in cement concrete (1:2:4) block 100 x 75 x 150 mm.  The cistern shall be provided with 20 mm nominal bore G. I. overflow pipe 185 cm long with fittings.  The outlet or flush pipe from the cisterns shall be connected to the pan by means of cement or putty joint.  The flush pipe shall be fixed to wall by using holder bat clamps of required shape and size so as to fit tightly on the pipes when tightened with screwed bolts.  The clamps shall be embedded in brick work in cement mortar 1:3 (1 cement : 3 coarse sand).  If connection between cistern and pan in made with G. I. pipe the bends and offsets shall be made cold.

11.4.2 Low level cistern - Clause 11.4.1. shall apply except that connection between cistern and closet shall be made by means of 40 mm dia flush bend with rubber or G. I. inter connection as specified.

11.4.2.1 Automatic cistern - Clause 11.4.1. shall apply except that CP Brass stop cock shall be provided for cistern having a capacity of more than 5 liter. The main & distribution flush pipe shall be fixed to the wall by means of standard pattern holder bat clamp shown in Fig. 10.

11.4.3 Measurements - Cistern, including all fittings, shall be enumerated.

11.4.4 Painting -The cistern, brackets, overflow and flush pipes etc. shall painted, if specified with two or more coats of paints of approved colour, shade and quality.

11.4.5 Rate - The rate shall include the cost of all materials and labour involved in all the operations described above.

11.5 SPECIFICATIONS FOR INSTALLATION OF MIRROR 

11.5.1 Fixing - The mirror shall be mounted on backing with environmentally friendly material other than asbestos cement sheet shall be fixed in position by means of 4 C. P. brass screws and C. P. brass washers, over rubber washers and wooden plugs firmly embedded in walls. C. P. brass clamps with C. P. brass screws may be an alternative method of fixing, where so directed.  Unless specified otherwise the longer side shall be fixed horizontally.

11.5.2 Measurements - Mirror shall be enumerated.

11.5.3 Rate - Rate shall include the cost of all the materials and labour involved in all operations described above.

11.6 Fixing and jointing of pipes and fittings - The specifications as described  shall apply, as far as applicable, except that the joint shall be lead caulked. All soil pipes shall be carried up above the roof and shall have sand cast iron terminal guard.

11.6.1 Height of ventilating pipes - The ventilating pipe or shaft shall be carried to a height of atleast 60 cms above the outer covering of the roof of the building or in the case of a window in a gable wall or a dormer window it shall be carried up to the ridge of the roof or atleast 2 metres above the top of the window.  In the case of a flat roof to which access for use is provided it shall be carried up to a height of 2 metres above the roof and shall not terminate within 2 metres, measured vertically from the top of any window opening which may exist up to a horizontal distance of 3 metres from the vent pipe into such building and in no case shall be carried to a height less than 3 metres above plinth level.  In case the adjoining building is taller, the ventilating pipe shall be carried higher than the roof of the adjoining building, wherever it is possible.

The pipes above the parapet shall be secured to the wall by means of M. S. stay and clamps as specified in 11.1.8.

The connections between the main pipe and branch pipes shall be made by using branches and bends with access doors for cleaning.  The waste from lavatories, kitchen, basins, sinks, baths and other floor traps shall be separately connected to respective waste stack of upper floors.  The waste stack of lavatories shall be connected directly to manhole while the waste stack of others shall separately discharge over gully trap.  Where single stack system is provided, the connection shall be made direct to the manhole.

11.6.2 Jointing - The interior of the socket and exterior of the spigots shall be thoroughly cleaned and dried.  The spigot end shall be inserted into the socket right up to the back of the socket and carefully centered by two or three laps of treated spun yarn, twisted into ropes of uniform thickness, well caulked into the back of the socket.  No piece of yarn shall be shorter than the circumstance of the pipe. The jointed pipe line shall be at required levels and alignment.

The leading of pipes shall be made by means of ropes covered with clay or by using special leading rings.  The lead shall be melted so as to be thoroughly fluid and each joint shall be filled in one pouring.

The following precautions shall be taken for melting lead:

  1. The pot and the ladle in which lead shall be put shall be clean and dry.
  2. Sufficient quantity of lead shall be melted.
  3. Any scum or dross which may appear on the surface of the lead during melting shall be skimmed off.
  4. Lead shall not be overheated.

After the lead has been run into the joint the lead shall be thoroughly caulked. Caulking of joints shall be done after a convenient length of the pipes has been laid and leaded.

The leading ring shall first be removed and any lead outside the socket shall be removed with a flat chisel and then the joint caulked round three times with caulking tools of increasing thickness and hammer 2 to 3 kg. weight. The joints shall not be covered till the pipe line has been tested under pressure.

Use of collars for jointing is not permitted in any concealed or embedded location.  However, in exposed locations where full length pipes cannot be fixed due to site constraints, collars (and not loose sockets) may be used subject to the following.

  1. No two consecutive joint shall be with the use of collars.
  2. The joint of collar with the cut/spigot end of pipe shall be made on the ground in advance and tested against leakage before fixing.
  3. Cut/spigot end of the pipes shall be inserted in the collars up to the projection inside the collar and jointing shall be done as in the case of socket and spigot joint.  The jointed pipe line shall be at required level/slope and alignment.

 

Pipe dia (size in mm)

As marked in fig.

50

75

100

150

a)

76

101

129

181

b)

50

75

100

150

c)

10

10

10

10

d)

79

89

95

108

e)

89

101

114

140

 Note - The dimensions of loose sockets shall correspond to those of appropriate nominal size of pipe.

11.6.3. Testing - In order to ensure that adequate lead is poured properly into the joints and to control waste in used of lead, at the beginning of work three or four sample joints shall be made and the quantum of lead per joint approved by the Engineer.  All sand cast iron/cast iron (Spun) pipes and fittings including joint shall be tested by smoke test to the satisfaction of the Engineer and left in working order after completion. The smoke test shall be carried out as under:

Smoke shall be pumped into the pipes at the lowest end from a smoke machine which consists of a bellow and burner.  The material usually burnt is greasy cotton which gives out a clear pungent smoke which is easily detachable by sight as well as by smell,  if there is leak at any point of the drain.

11.6.4 Painting - All sand cast iron / cast iron (Spun) pipes and fittings shall be painted with shade to match the colour of the back ground as directed by the Engineer.

11.6.5 Measurements

11.6.5.1 The pipes shall be measured net when fixed in position excluding all fittings along its length, correct to a cm.

11.6.5.2 When collars are used for jointing SCI pipes these shall be measured as fittings and shall be paid for separately.

11.6.5.3 No allowance shall be made for the portions of the pipe lengths entering the sockets of the adjacent pipes or fittings.  The above shall apply to both cases i.e., whether the pipes are fixed on wall face or embedded in masonry.

11.6.5.4 No deduction shall be made in the former case from the masonry measurement for the volume of concrete blocks embedded therein.  Similarly no deduction shall be made for the volume occupied by the pipes from the masonry when the former are embedded in the later.

11.6.6 Rates - The rate shall include the cost of all labour and materials involved in all the operations described above, excluding fittings, lead caulk jointing, the supply an fixing M. S. holder bat clamps and M. S. stays and clamps, floor trap and painting, which shall be paid for separately.

11.7. SPECIFICATIONS FOR INSTALLATION OF SEAT AND COVER TO WATER CLOSET

11.7.1 Fixing - The seat shall be fixed to the pan by means of two corrosion resistant hinge bolts with a minimum length of shank of 65 mm and threaded to within 25 mm of the flange supplied by the manufacturer along with  the seat. Each bolt shall be provided with two suitably shaped washers of rubber or other similar materials for adjusting the level of the seat while fixing it to the pans.  In addition, one non-ferrous or stainless steel washer shall be provided with each bolt.  The maximum external diameter of the washer fixed on the underside of the pan shall not be greater than 25 mm.  Alternative hinging devices as supplied by the manufacturer of the seat can also be used for fixing with the approval of engineer.

11.7.2 Measurements - Seat with cover shall be enumerated.

11.7.3 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.

11.8 SPECIFICATIONS FOR INSTALLATION OF SINK

The installation shall consist of assembly of sink C. I. brackets, union and G. I. or PVC waste pipe.

11.8.1 Fixing - The sink shall be supported on C. I. cantilever brackets, embedded in cement concrete (1:2:4) block of size 100 x 75 x 150 mm. Brackets shall be fixed in position before the dado work is done.  The C. P. brass or PVC union shall be connected to 40 mm nominal bore G. I. or PVC waste pipe which shall be suitably bent towards the wall and shall discharge into a floor trap.  C. P. brass trap and union and waste shall be paid separately.  The height of front edge of sink from the floor level shall be 80 cm.

11.8.2 Measurements - The sinks shall be enumerated.

11.8.3 Rate - Rate shall include the cost of all materials and labour involved in all the operations described above but shall not included the cost of waste fitting and brackets which shall be paid for separately.

11.9. SPECIFICATIONS FOR INSTALLATION OF URINAL LIPPED, HALF STALL (SINGLE OR RANGE) (Fig 9 &11)

Urinal installation shall consist of a lipped urinal (Single or range), an automatic flushing cistern, G. I. flush and waste pipe.  The capacity of flushing cistern and relevant size of flush pipe for urinals in a range shall be as specified in Table  2.

Waste pipe shall be 32 mm nominal bore G. I. pipe and shall be paid separately.

11.9.1 Fixing - Urinals shall be fixed in position by using woolen plugs and screws. It shall be at a height of 65 cm from the standing level to the top of the lip of the urinal, unless otherwise directed by the Engineer. The size of wooden plugs shall be 50 mm x 50 mm at base tapering to 38 mm x 38 mm at top and length 5.0 cms. These shall be fixed in the wall in cement mortar 1:3 (1 cement : 3 fine sand).  After the plug fixed in the wall, the mortar shall be cured till it is set.

Table 2

No. of urinals in range

Capacity of flushing cistern

Size of flush pipe    (Galvanized iron)

Main

Distribution

One

5 Litres

15 mm

15 mm

Two

10 Litres

20 mm

15 mm

Three

10 Litres

25 mm

15 mm

Four

15 Litres

25 mm

15 mm

Each urinal shall be connected to 32 mm dia waste pipe which shall discharge into the channel or a floor trap.  The connection between the urinal and flush or waste pipe shall be made by means of putty or white lead mixed with chopped hemp.

11.9.2 Measurements - Urinals shall be enumerated.

11.9.3 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.

11.10. SPECIFICATIONS FOR INSTALLATION OF STALL URINAL (SINGLE OR RANGE) (Fig. 10)

The installation shall consist of stall urinal (single or range), automatic flushing cistern, C. P. brass standard flush pipes, C. P. brass spreader and C. I. trap with tail piece and outlet grating of C. P. brass. Capacity of flushing cistern and relevant size of flush pipe, C. I. trap shall be as prescribed in Table 19.3.

11.10.1 Fixing - The floor slab shall be suitably sunk to receive the stall urinal.  Where the floor slab is not sunk, the stall urinal shall be provided over a platform.  The lip of the stall urinal shall be flush with the finished floor level adjacent to it.  The stall urinal shall be laid over a fine sand cushion of average 25 mm thickness. A space of not less than 3 mm shall be provided alround, in front, sides and filled with water proofing plastic compound.  Care shall be taken that after the sub-grade for the floor is cast, one week should lapse before urinals are installed.  Generally fixing of the tread plate shall be as specified.  The trap and fittings shall be fixed as directed by the engineer.  Payment for the floor and its sub-grade shall be made separately.

11.10.2 Measurements - Stall urinals shall be enumerated.

11.10.3 Rate - The rate shall include the cost of all the materials and labour involved in all the operations described above.

11.11 Specifications for Installation Of Wash Basin (Fig. 14,15,16,17 & 18)

The installation shall consists of an assembly of wash basin, pillar taps, C. I. brackets, C. P. brass or PVC union, as specified.  The wash basin shall be provided with one or two 15 mm C. P. brass pillar taps, as specified.  The height of top of the rim of was basin from the floor level shall be within 750 mm to 800 mm.

11.11.1 Fixing - The basin shall be supported on a pair of C. I. cantilever brackets conforming to IS: 775-1970-1970 & be embedded in cement concrete (1:2:4) block 100 x 75 x 150 mm.  Use of M. S. angle or Tee section as bracket is not permitted. Brackets shall be fixed in position before dado work is done. The brackets have shown in Fig. 15.   The wall plaster on the rear shall be cut to rest over the top edge of the basin so as not to leave any gap for water to seep through between wall plaster & skirting of basin.  After fixing the basin, plaster shall be made good and surface finished to match with the existing one S. C. I. floor traps conforming to IS: 1729 having 50 mm water seal (minimum 35 mm in two pipe system with gully trap) should be used.  Waste pipes laid horizontally should have gradient not flatter than 1 in 50 and not steeper than 1 in 10.

Table 3

No. of urinals in range

Capacity of

flushing cistern

Size of flush pipe (Chromium plated)

Diameter of C.I traps

Main

Distribution

 

One

5 Litres

15 mm

15 mm

50 mm

Two

10 Litres

20 mm

15 mm

50 mm

Three

15 Litres

25 mm

15 mm

80 mm

Four

15 Litres

25 mm

15 mm

80 mm

The waste water from wash basin shall be discharged directly to vitreous semi-circular open drain, discharging to a floor trap and finally to the vertical stack (Fig. 15) on upper floors and in case of ground floor, the waste water shall be discharged either directly to the gully trap or through the floor trap (Fig. 16).  C. P. brass trap and union are not to be used in situations.

If waste pipe is concealed or crosses the wall, waste water shall be discharged through non ferrous trap like PVC Engineering plastic or C. P. brass and union (Fig. 17) to vertical stack.  The C. P. brass trap and union shall be paid for separately.

Where so specified a 20 mm G. I. puff pipe terminating with a perforated brass cap screwed on it on the outside of the wall or connected to the anti-sIphon stack shall be provided.

11.11.2 Measurements - Wash basins shall be enumerated.

11.11.3 Rate - The rate shall include the cost of all the materials and labour involved in all the operations described above.

11.12 Specifications For Installation Of Squatting Pan

The installation shall consist of squatting pan, flushing cistern, flush pipe and a pair of foot rests.

11.12.1 Fixing - The pan shall be sunk into the floor and embedded in a cushion of average 15 cm thick cement concrete 1:5:10 (1 cement : 5 fine sand : 10 graded brick ballast 40 mm nominal size).  The concrete shall be left 115 mm below the top level of the pan so as to allow flooring an its bed concrete.  The pan shall be provided with a 100 mm S. C. I., P or S type trap with an approximately 50 mm seal and 50 mm dia vent horn,  where required by the engineer.  The joint between the pan and the trap shall be made leak proof with cement mortar 1:1 (1 cement : 1 fine sand).

11.12.2 Measurements - The squatting pans shall be enumerated.

11.12.3 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.  Cost of concrete shall be paid separately.

11.13 Specifications for Installation Of Water Closet

Installation shall consist of water closet with seat and cover, flushing cistern and flush bend.

11.13.1 Fixing - The closet shall be fixed to the floor means of 75 mm long 6.5 mm diameter counter-sunk bolts and nuts embedded in floor concrete.

Measurements -  Water closets shall be enumerated.

11.13.2 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.

11.14 SPECIFICATIONS FOR INSTALLATION OF FOOT RESTS

11.14.1 After laying the floor around squatting pan as specified a pair of foot rests shall be fixed in cement mortar 1:3 (1 cement : 3 coarse sand).  The position of foot rests with respect to pan shall be as per Fig. 4.

11.14.2 Measurements 

Pair of foot rests shall be enumerated.

11.14.3 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.

11.15 SPECIFICATIONS FOR NSTALLATION OF SQUATTING PLATE (SINGLE OR RANGE) (Fig. 12) 

The installation shall consist of an assembly of squatting plates (single or range), vitreous China channel, automatic flushing cistern, flush pipe with fittings spreader and C. I. trap.  The capacity of flushing cistern and relevant size of flush pipes shall be as specified in Table 4.

11.15.1 Fixing - The floor slab shall be suitably sunk to receive the squatting plate, where the floor slab is not sunk, the plates shall be provided over a platform.  The top edge of the squatting plate shall be flush with the finished floor level adjacent to it.  It shall be embedded on a layer of 25 mm thick cement mortar 1:8 (1 cement : 8 fine sand) laid over a bed of cement  concrete 1:5:10 (1 cement : 5 fine sand : 10 graded brick aggregate 20 mm nominal size. There shall be 100 mm dia, white glazed vitreous China channels with stop and outlet pieces suitably fixed in the floor in cement mortar 1:3 (1 cement : 3 coarse sand) and joint finished with white cement.  The squatting plate shall have 1200 high and half brick thick wall in front and on either side of the squatting plate.  The brick work for the walls shall be paid separately.  The exposed surface of walls shall be lined with white glazed tiles with proper corners and angles set in neat cement mortar, the face of the joints shall be gone over with whiting so as to match with the colour of the tiles.  The tiles shall be 15 mm square.  Space if any, left between the side walls and squatting plate shall be finished white to match the colour of the squatting plate.  The trap and fittings shall be fixed as directed by the engineer.  The vitreous China channel shall discharge into 65 mm diameter standard urinals, C. I. trap with vent arm having 65 mm C. P. brass outlet grating.

11.15.2 Measurements 

Squatting plates shall be enumerated.

11.15.3 Rate - The rate shall include the cost of all the materials and labour involved in all the operations described above.

11.16 Speicification For Installation Of Towel Rail

It shall be fixed in position by means of C. P. brass screws on wall surface by PVC clash fasteners, firmly embedded in wall.

11.16.1 Measurements - Towel rails shall be enumerated.

11.16.2 Rate - Rate shall include the cost of all the materials and labour involved in all the operations described above.

Table 4

No. of squatting    Plates in   range

Capacity of  flushing cistern

Size of flush pipe  (galvanized iron)

Main

Distribution

One

5 Litres

-

20 mm

Two

10 Litres

25 mm

20 mm

Three

15 Litres

32 mm

20 mm

Four

15 Litres

32 mm

20 mm

Annexure 11-A.1

METHOD OF INSPECTION FOR DEFECTS OF BATH TUBS

(Clause 11.1. 2.)

The surface of the bath tubs shall be visually inspected for blemishes from a distance of 600 mm after being inked.  The light source shall be partially diffused daylight supplemented, if necessary, with diffused artificial light to provide illumination comparable to that usually available within short distance of the outside window facing north, but not in direct sunlight. The illumination shall have an intensity of 1,000 to 2,000 lux. Blemishes other than those given in Table 1 shall not be allowable.

Ink Test - To do the visual examination of the surface of the bath tub, ink is applied to the area to be inspected as follows,

  1. Wash the entire area to be inspected with a water soluble ink.
  2. Rinse the surface with fresh water and dry.  Ink will remain entrapped in cracks pits etc.

All references to visible defects shall refer to defects apparent to the eye open close inspection, after the surface has been ink tested.

Defects whose Presence cannot be permitted:

The defects whose presence cannot be permitted are listed in Table 1.

Table 1 Defects which cannot be permitted

Part

Non-permissible defects

Upper rim, inner wall, bottom, apron, other readily visible faces.

Small pores, wrinkle, craze, bubbles, defective impregnation, superficial defects, injuries, aggregate defects.

Obscure faces

Defective impregnation, superficial defects.

The permissible range of defects

The permissible range of various defects is listed in Table 2.

Table 2 Permissible defects

Defects/ parts

Upper   rim

Inner   wall

Apron

Bottom

Other   readily   Visible   parts

Traces of mending

2

2

2

2

Not conspi  cuous

Impurities

2

3

2

3

-do-

Pinholes

2

3

2

3

-do-

Colour blot

Should not be conspicuous

Unevenness

Should not be conspicuous

Deformity

The horizontal section of the upper rim shall drain off water readily.  The bend of the section in contact with wall shall be less than 5 mm. Deformities of the other sections of the bath tub shall not be conspicuous.

*****