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CIDCO OF MAHARASHTRA LIMITED SL. PG. NO. C.A. NO. 02/CIDCO/EE(B&U-I)/2010-11

PARTICULAR SPECIFICATIONS

WATER SUPPLY & SANITARY WORK

1.0 GENERAL:

These specifications shall cover supply, installation testing &

commissioning of all works related with public Health Engineering.

In general these shall cover the following:

a) Internal and external water supply.

b) Internal and external drainage system

c) Soil, waste and vent pipe system.

d) Sanitary fixtures and fittings

e) Rain water pipes.

f) External storm water drainage system

g) Water Supply pumping system.

2.0 WATER SUPPLY:

2.1.0 INDIAN STANDARD TO BE FOLLOWED SHALL BE AS

UNDER:

2.1.1 I.S. 1239 (Part I) Specification for galvanized MS Pipes

2.1.2 I.S. 4736 – 1986 - do-

2.1.3 I.S. 1239 (Part II) Specification for galvanized fittings

2.1.4 I.S. 1879 (Part 1 to 10) - do –

2.1.5 I.S. 779 – 1079 Specification for water meter

2.1.6 I.S. 778 Specification for Gate globe & check

valve


2.1.7 I.S. 780 Specification for Sluice valve.

2.1.8 I.S. 5312 (Part 1) Specification for non return valve

2.1.9 I.S. 1069 Specification for crome plating

2.1.10 I.S. 909 – 1975 Specification for U.G. Fire hydrant

sluice vlave.

2.1.11. I.S.. 2065 – 1972 Code of practice for water supply in

building

2.2 MATERIALS:-

2.2.1 GALVANIZED PIPES:

The heavy duty (Class “C) G.I. pipes for concealed / below ground.

2.2.1.1 The medium grade (Class B) galvanized M.S. pipes hot finished,

welded or electric resistance welded, galvanized conforming to IS:

1239 (Part 1) and IS: 4736 – 1986 shall be used in work unless

otherwise specified. The pipes shall have specified marking code as

per I.S.

2.2.1.2 The fitting shall be mild – steel tubular or wrought steel fittings,

conforming to IS: 1239 (Part II). The fitting may be butter welded or

seamless. Alternatively fittings may comply with the requirements

of I.S. 1879 (Part 1 to 10). The fittings shall be galvanized.

2.2.1.3 These pipes and fittings shall be well galvanized internally and

externally.


2.2.1.4 These shall be free from any visible or hidden defects. Galvanising

shall be uniform, reasonably smooth, free from imperfections such

as flux, ash, blackspot, pimples, runs, rust stains, blisters etc.

2.2.2 FIXING MATERIAL

2.2.2.1 The spun yarn shall be clean and sterile. For lead caulking, it shall

be soaked in hot coal caulking tar or Bitumen and cooled before use.

2.2.2.2 Fibre board or Rubber rings shall be used for fitting C.I. flanged type

piping. These shall be of smooth, hard, compressed fibre board or

rubbed of thickness 1.5 mm to 3 mm and of each width so as to fit

inside the circle bolts. The fibre board shall be impregnated shall

weigh not less than 110 gms/sqm per mm thickness and shall have

smooth hard surface.

2.2.3 FITTTINGS:

2.2.3.1 VALVES:

All valves (gate, globe, check, safety etc.) shall be either of brass or

gunmetal, suitable for the particular service. All valve shall be of

the particular duty and design called for, similar to Leader of G.G.

Bombay make or approved equivalent. Valves shall be tested to 21

kg/sq.cm pressure at manufacturer’s works. Valves may be either

screw type or flange type, with suitable flanges and non corrosive

bolts and gaskets. Tail pieces as required shall be supplied along

with valve. Gate globe and check valves shall conform to IS. 778

and non return valves to I.S. 5312 (Part I).


2.2.3.2 SLUICE VALVE:

Sluice valves shall have flanged ends of cast iron body. The spindle,

wall, seat and wedge nut shall be of gun metal. They shall generally

having rising spindle and shall be of the particular duty design called

for the valves shall be supplied with suitable flanges, non corrosive

bolts and asbestos fibre gaskets The valve shall be of “Kirloskar”

make or other equivalent approved. Sluice valve shall conform to

IS. 780 and I.S. 2506.

2.2.3.3 STOP VALVES:

The stop valve shall be of brass polished or chromium plated.

Minimum weights shall bhe

15 mm 0.4 Kg

20 mm 0.75 Kg.

The chromium plating shall conform to I.S. 1069.

2.2.3.4 WASHERS:

Washers for cold water taps shall be selected leather, rubber asbestos

compositon or of plastics as directed. Washers for hot water tap

shall be of good quality fibre or rubber asbestos compostion as

directed. Metallic washers where required shall also be chromium

plated, brass or brass polished matching to over all fittings.


2.2.3.5 BALL VALVES WITH FLOATS:

Ball valves with floats to be fixed in underground storage tanks shall

consist of brass lever arms having copper balls (28 SWG) screwed to

arm integrally. The copper bass shall have bronze welded seams.

The closing / opening mechanism incorporating the position and

cylinder shall be of a non corrosive metal and include washers. The

size and construction of ball valve and float shall be suitable for

desired working pressure operating the supply system. Ball valve

shall be supplied with brass hexagonal back nuts to secure them to

the tanks and a socket to supply pipes.

2.2.3.6 WATER METERS:

Water meters of approved make and design shall be supplied and

installed at locations as shown. The water meters shall meet with the

approval of the local supply authorities. Suitable valves and

chambers to house the meters shall also be provided alongwith the

meters.

All meters shall conform to Indian Standard IS:779-1978 or IS:2273-

1981 and of a approved manufacturer. Where called for water meter

shall be located in masonry chamber of appropriate size as indicated.

2.2.3.7 GARDEN HYDRANTS:

Garden hydrants shall be of 20 mm size, unless otherwise indicated.

All hydrants shall be provided with gate valve and threaded nipple to


receive Hose pipe. Where called for garden hydrant shall be located

in masonry chambers of 300 x 300 x 300 mm size.

2.3 WORKMANSHIP

2.3.1 PIPES TRENCHES:

2.3.1.1 Excavation and refilling shall comply with earth work section

detailed earlier. Also items pertaining to building work shall be as

per relevant sections detailed in this contract.

2.3.1.2 The trench excavation shall be very carefully carried out especially

bottom of trench to allow pipes well bedded for their whole length

on a firm surface and on true to level and gradient. Any extra depth

cut out at the bottom of the pipeline shall be made good with

cement concrete of mix 1:5:10.

2.3.1.3 In some cases tarmeted finished surface becomes soft after leveling.

It shall be treated by providing 80 mm thick gravel or broken stoe

layer base well compacted.

2.3.1.4 In case of excavation in rock, the trench shall be excavated 150 mm

below required depth. The trench shall be brought to the required

levels by filling with a layer of fine selected material or where there

is steep gradient on a layer of concrete.


2.3.1.5 Refilling of trenches shall not be carried out until pipes are tested

checked and approved by Engineer.

2.3.2 PIPE LAYING:

2.3.2.1 Pipes shall be examined carefully for any visible defects before

being shifted. Any coating, sheathing of pipes shall be examined and

repaired wehre necessary.

2.3.2.2 Pipes shall be cleaned and cleared of all foreign matter before being

laid. They shall be brushed internally to remove any soil that might

have accumulated therein.

2.3.2.3 Pipes up to 250 mm dia may be handled without mechanical

equipment. In no case pipes shall be rolled and dropped into the

trench. Mechanical device shall be used in case of large pipes.

2.3.2.4 Pipes of large diameter shall be laid at gradient to allow air travels to

air valves.

2.3.2.5 When pipes are laid on pillars, the socket should be well clear of

machinery to allow the lead joints to be caulked.


2.3.2.6 At the end of each day’s work the last pipe shall be securely closed

to prevent entry of water, soil, rats etc.

2.3.2.7 Galvainized steel pipes shall be jointed with screwed and socketed

joints, using screwed fittings, Care shall be taken to remove any burr

from the ends of the pipes after thread cutting. Whit lead or an

equivalent jointing compound shall be used, according to the

manufacturer’s instructions, with a gurmetn of a few stands of fine

yarn while tightening. Compounds containing red lead shal not be

used because of the danger of contamination of water. Any threads

exposed after jointing shall be painted with bituminous paint to

prevent corrosion.

2.3.2.8 Pipes and joints laid for water supply system shall be tested to

pressure of 5 Kg per sq.cm for two hours without developing leaks /

fall in pressure. In case of leaks piping shall be redone in such

portions and the test repeated till achieving satisfactory result.

2.3.2.9 G.I. pipes shall run on the surface of walls and ceilings and not in

chase. The fixing shall be done with standard pattern holder bat

damp of required size keeping clear distance of about 1 to 1.5 cm

from wall. Where pipes are ordered chased and concealed these

shall be insulated for hot water and painted with tar or bitumen in

cases. G.I. pipes shall be jointed with screwed and socket joints.


Threads shall be cleaned to remove burrs. White lead or equivalent

jointing compound with a grument of a few standards of fine yarn

shall be used while fittings.

Water supply shall be tested to a pressure of 5 Kg/sq.cm for internal

and 7 Kg/sq.cm for all external pipes for two hours without

developing leaks/fall in pressure. All leaking pipes to be removed

and replaced at no extra cost of contract.

2.3.2.10 The spacing of G.I. pipes clamping shall be as suggested under:

SIZE OF PIPE IN MM DISTANCE IN METER

HORIZONTAL VERTICAL

15 2 2.5

20 2.5 3

25 2.5 3

32 2.5 3

40 3 3.5

50 3 3.5

Clamps at turning and near to fitting shall be fixed closely to give

fully rigidity.

2.3.2.11 All pipes laid below ground shall rest on solid prepared bed concrte

base and shall be protected by cement concrete up till haunches of


the pipes. Other than small pipes under low pressure, all pipes shall

be provided with concrete thrust blocks of specified size at bends to

transmit hydraulic thrust on to the undisturbed ground. Concrete

anchor blocks of sufficient weight shall be made after the joints have

been caulked with lead.

2.3.2.12 The sluice valve shall be cleared of all foreigned matter and

examined prior to use in works. It shall be fixed in position by

means of bolts, nuts and 3 mm rubber insertions or chemically

treated compressed fibre board 1.5 mm thickness and weight not less

than 0.183 gm per sq.cm. The tail piece shall conform to IS: 1983 –

1960. These shall be jointed to the pipe by means of lead caulked

joints.

2.3.2.13 Required reflex, check, non-return valves or flap valves must be

provided in the piping to control burst in main and where flow

reverse its directions.

Foot valve shall be provided at end of suction lines of pumps and

they shall be in vertical positions

Relief valve shall be provide in delivery pipe of pumping station to

save pump, from damage or strain in case of sudden stoppage of

water flow. With two more pumps discharging into the same main,

each of them shall be provided with a non-return and an air relief

valve.


2.3.2.14 Codes of practice listed in 1.0 shall be followed strictly.

2.3.2.15 It shall be responsibility of contractor to repair, resotre to its original

condition any damage caused to the building, to electric, santitary,

water supply or other installation, etc. No extras shall be paid on

these accounts unless damage is not due to any failure on the part of

contractor. Engineer’s decision in this regard shall be final and

binding on all parties without any further discussion at any level.

2.3.2.16 Checking the quality of pipes before using in the works:

The Pipes and fittings shall be inspected at site before use to

ascertain that they confirm o the specification given in para 1.1

above. Thickness of pipe wall and eight of pipe for one meter length

of pipe shall be necessarily checked to ensure the appropriate class

of pipe (medium class/heavy class) before acceptance of the pipe for

use in the building. The wall thickness of pipe has to be checked

accordingly to second decimal of a millimeter using a screw gauge.

The defective pipes shall be rejected. Whiel curing , layin and

jointing for internal and external works, where the pipes have to be

cut or rethreaded, the ends shall be carefully filed out so that no

obstruction to bore is offered. The requirements of IS 554-1985

with pipe dies and taps be observed carefully in such a manner as

will not result in slackness of joints when the two pieces are screwed

together. The taps and dies shall be used only for straightening

screws threads which have become bent or damaged and shall not


be used for turning of the threads so as to make them slacks, a the

later procedure may not result in a water tight joint. The screw

threads of pipes and fittings shall be protected from damage until

they are fitted.

2.3.2.17 Jointing of G.I. Pipes

The pipes shall be cleaned and cleared of all foreign matter before

being laid. In jointing the pipes, the inside of the socket and the

screw ends of the pipes shall be oiled and rubbed over with white

lead and few turns of spun yarn wrapped round the screwed end of

the pipe. The end shall then be screwed in the socket, tee etc. with

the pipe wrench. Care should be taken that all pipes and fittings are

properly jointed so as to make the joints completely water tight and

pipes are kept at all times free from dust and dirt during fixing. Burr

from the joint shall be removed after screwing. After laying the

open ends of the pipes shall be temporarily plugged to prevent

access of water, soil or any other foreign matter. Any threads

exposed after jointing shall be painted or in the case of underground

pipes thickly coat of approved anticorrosive paint be applied to

prevent corrosion.

2.4.1 EXCAVATION IN TRENCHES:

2.4.1.1 Authorised quantities or those actually excavated, whichever are less

shall be allowed.


2.4.1.2 For the purpose of calculating cubic contents, cross sections shall

normally be taken at suitable intervals, i.e. manhole or wall chamber

intervals except in abnormal cases like sudden change in strata or

undulating ground etc. When they may be taken at closure intervals

as approved by the Engineer whose decision shall be final ,

conclusive and binding.

3.0 DRAINS AND SEWERAGE

3.1 Indian Standard to be followed shall be as under:

3.1.1 13592 & 4985 Specification for fittings.

3.1.2 458 – 1871 Specification for concrete pipes

3.1.3 3486 – 1960 Specification for cast iron spigot and

socket drain pipes.

3.1.4 5455 – 1969 Specification for cast iron steps for manhole

3.1.5 1729 – 1984 Specification for sand cast iron spigot and

Socket soil waste and vent pipe and

accessories.

3.1.6 1537 – 1960 Specification for vertically cast iron pressure

pipes for water, gas and sewage.

3.1.7 1742 – 1972 Code of Practice for building drainage.

3.1.8 1172 – 1971 Code of basic requirements for water supply,

drainage and sanitation


3.1.9 783 – 1958 Code of practice for laying of concrete pipes

3.1.10 1230 – 1968 Specification for cast iron rain water pipes

& fittings.

3.1.11 1626 – 1960 Specification for asbestos cement building

pipes and fittings (spigot and socket type).

3.2 MATERIALS:

3.2.1 STONEWARE PIPES AND FITTINGS:

The salt glazed stoneware pipes and fittings shall conform to grade

A class. Surfaces remaining exposed internally and externally of

pipes and fitting shall be glazed. Pipes shall be sound , free from

fire cracks, hair cracks which impair the strength, durability and

serviceability. The glaze of the pipes and fittings shall be free from

casing. There shall be no broken blisters. The pipes and fittings

shall given clear note when struck with a light hammer. Pipes and

fittings shall conform to I.S. 651 – 1980.

The pipes shall be hard, smooth, even textured, truly circular in cross

section, perfectly straight and of standard nominal diameter with

correct depth and diameter.

3.2.2 CEMENT CONCRETE PIPES:

The pipes shall be with or without reinforcement as required and

shall be of specified class. These shall conform to IS: 458 – 1971.


The reinforced cement concrete pipes shall be manufactured by

centrifugal (or spun) process while un-reinforced cement concrete

pipes by spun or pressure process. All pipes shall be true to shape,

straight, perfectly sound and free from cracks and flaws. The

external and internal surface of the pipe shall be free from defects

resulting from imperfect grading of the aggregate mixing or

moulding.

Concrete used for the manufacture of reinforced and un-reinforced

pipes and c.c. shall not be leaner than 1:2:4 (1 cement: 2 coarse sand:

4 grade stone aggregate) The maximum size of the aggregate should

not exceed one third of the thickness of the pipe or 20 mm

whichever is smaller. The reinforcement in the reinforced concrete

pipes shall extend through out the length of the pipe. The

circumferential reinforcement shall be adequate to with-stand the

hydrostatic pressure and further bending stress due to the weight of

the water when running full across the span equal to the length of the

pipe plus three times its own weight.

3.2.3 MANHOLE COVERS AND FRAMES:

All manholes covers and frames shall be of precast fibre reinforced

concrete covers or RCC as indicated in schedule of quantities. Light

duty, medium duty and heavy duty shall be employed depending

upon location, type of traffic expected to be carried over them.


Cover shall be marked with sewer or storm depending upon its use

while being cast. Covers shall have raised chequered design to

provided non-slilppery surface. They shall be painted with black

bituminous composition to withstand temperature upto 63 degree C

and 0 degreee C. Covers shall be recessed to provide grip for lifting

keys. Covers and frames shall have proper seals to avoid gases

coming out.

3.2.4 GULLY TRAPS / FLOOR TRAPS:

S.W. gully traps shall be conforming to .S. 651 . Gully trap shall be

provided with RCC cover 300 mm x 300 mm and frame. The

minimum weight of cover shall be 4.53 Kg. and of frame 2.72 Kg.

RCC cover and frames shall be of good quality free from any defects

and seal faces and edges fully square machined.

3.2.5 NAHANI TRAP:

The CI long arm deep seal (Minimum 50 mm), nahani trap shall be

sound and free from porosity or any other defect which affects

serviceability. It shall conform to relevant Indian Standard and as

approved by Engineer or of specified or equivalent approved make.

Trap shall be self cleansing design and size as shown in drawing or

as specified. Trap shall be provided with PVC grating screwed to

trap with even perforations (as specified in BOQ). Joints of nahani

trap shall be with rubber rings.


3.2.6 VENT SHAFTS:

Vent shafts may be UPVC pipes conforming to relevant I.S.

3.2.7 RUNGS:

Cast iron steps conforming to I.S. 5455 shall be used. G.I. rungs if

approved by Engineer may be permitted in place of C.I. specified.

3.3 WORKMANSHIP:

3.3.1 GENERAL:

3.3.1.1 Various trades required to be carried out along with these items shall

follow relevant specifications given for such works in relevant

sections.

3.3.1.2 All sewers and /drains laid below ground shall be water tight.

3.3.1.3 First operation of refilling shall be done carefully as far as possible

hand packing by find selected material. Packing operation should be

simultaneous on both sides of pipe and should continue till 150 mm

above tope of pipe. Filling shall be done in dry trenches only.

3.3.1.4 All pipes, when laid above ground shall be air and water tight.

3.3.1.5 Pipes shall rest on solid prepared bed concrete. SW pipes shall be

provided with cement concrete alround the pipe where as RCC pipes

shall be provided with cement concrete upto the haunches of the

pipe.


3.3.1.6 If excavation has been carried out lower than required packing shall

be in cement concrete 1:5:10 (1 cement: 5 fine sand: 10 graded stone

aggregate)

3.3.1.7 Pipes shall be laid with socket leading uptil and shall rest on solid

and even foundations for full lengths of the barrel.

3.3.1.8 Collar pits, socket holes shall be formed sufficiently deep, to allow

just sufficient space for pipe jointer to work light round the pipes.

3.3.1.9 Trenches shall be kept free from water until joints are sufficiently

set.

3.3.1.10 Pipes shall be examined to see that there are no cracks or defects.

3.3.1.11 Work shall be tested and got approved in writing by Engineer prior

to covering of pipes.

3.3.2 MANHOLES:

3.3.2.1 Manholes of different types and size shall be constructed in sewer

lines at location indicated on drawings or as directed by Engineer in

due course. Size of manhole referred shall be internal clear size in

very case.

3.3.2.2 Sewers of unequal sectional area shall not be jointed at same invert

in manhole. The invert of smaller sewer at its junction with main

shall be at least 2/3rd the diameter of the main above the invert of the


main. The main branch sewer should deliver sewerage in the

manhole in the manholes direction of main flow and junction must

be made care so that flow in main is not impeded.

3.3.2.3 No drain from house fitting e.g. gully trap or soil pipe etc. to

manhole shall normally exceed a length of 6 meter unless it is

unavoidable.

3.3.2.4 Normally standard for manhole sizes shall be as under. It is to be

noted that various sizes will depend upon the number of connections

to be done in manhole.

Manholes 900 x 450 mm are generally constructed within the

compound for house drainage only and near the buildings for house

drainage for depth of 1.20 meter or less conical manholes 1.2 m dia

(bottom) are constructed for drainage work for depth between 1.2

and 2.5 meters. Maholes 1.5 m dia (bottom are of the conical type

and are generally constructed for main drainage works where depth

is 2.50 meter or more.

3.3.2.5 Standard manhole construction shall be as under:

a) BED CONCRETE:

The manhole shall be built on a bed of cement concrete 1:4:8

(1 cement: 4 coarse sand: 8 graded stone aggregate 20 mm

nominal size) the thickness of the bed concrete shall be 15


cms for manholes upto 1 meter depth 20 cm for manholes

from 1 meter to 2 meter depth and 30 cm for manholes of

greater depth. Projection of bed concrete beyond the masonry

wall shall be 15 cm.

b) WALL:

The wall of the manhole shall be of the following:

Brick masonry shall be in cement mortar 1:5 (1 cement: 5 coarse

sand)

3.3.2.5 The jointing face of each block being buttered with cement mortar

before laying so as to ensure a full joint.

c) PLASTER:

The inside of walls shall be plastered 12 mm thick with cement

mortar 1:5 (1 cement: 5 sand) and finished with a floating coat or

neat cement. All angles shall be rounded to 7.5 cm radius and all

rendered external surface shall have hard impervious finish obtained

by using a steel trowel. The internal joints of the masonry shall be

finished smooth. In wet ground 20 mm thick cement plaster of the

above specifications shall be carried on the outside surface of the

walls also. This shall be water proofed with addition of water

proofing compound in the proportion by weight recommended by

manufacturers.


d) CHANNELS AND BENCHING:

Channels shall be semicircular in the bottom half and of diameter

equal to the sewer. Above the horizontal diameter, the sides shall be

extended vertically to the same level as the crown of the outgoing

pipe and the top edge shall be suitably rounded off. The branch

channels shall also be similarly constructed with respect to the

benching but their junction with the main channel on appropriate fall

suitably rounded off in the direction or flow in the main channel

shall be given. The channels and benching shall be done in cement

concrete 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20

mm nominal size) rising at slope of 1 in 6 from the edge of channel.

The channels of bottom of the chamber shall be plastered with

cement mortar 1:2 (1 cement: 2 coarse sand) and steel trowelled

smooth with respect to the benching but thaw junction with the main

channel on appropriate fall suitably rounded off in the direction of

flow in the main channel shall be given. The channels and benching

shall be done in cement concrete 1:2:4 (1 cement: 2 coarse sand: 4

graded stone aggregate 20 mm nominal size) rising at slope of 1in 6

from the edge of channel. The channels of bottom of the chamber

shall be plastered with cement mortar 1:2 (1 cement: 2 coarse sand)

and steel trowelled smooth.

e) COVER SLABS:

These shall be RCC 1:2:4 (1 cement: 2 coarse sand: 4 graded stone

aggregate 20 mm nominal size) 15 cm thick reinforced with 10 mm

bars at 15 cm centres both ways, surface and edges finished fair.


Full bearing equal to the width of the wall shall be given to the slab

on all sides. The frame of the manhole cover shall be embedded

firmly in the RCC slab so that the top of the frame remains flush

with the top of the RCC slab.

f) TESTING:

Manholes shall be tested by filling with water to a depth not

exceeding 1.2 meter as directed by the Engineer.

3.3.3. INSPECTION CHAMBER:

Inspection chamber with provision of inlets of specified size for

under ground drains shall be constructed as per the following details:

a) Size

The inside dimension shall be taken as the clear internal

dimension between the masonry wall faces.

b) Excavation:

The excavation shall be done to dimensions and levels shown

on the plans or as directed by the Engineer.

c) Bed Concrete:

The foundation concrete shall consists of 15 cm thick cement

concrete 1:4:8 (1 cement: 4 fine sand: 8 graded stone

aggregate 20 mm nominal size). Projection of bed concrete

beyond the masonry walls shall be 7.5 cm.


d) Walls:

The specification of walls in para 3.3.2.5 (b) shall apply.

e) Plaster:

The specification at plaster in para 3.3.2.5 (c) shall apply.

f) Channel & Benching:

The specification of para 3.3.2.5 (e) of manholes shall apply.

g) Covers and Frames:

The specifications of para 3.2.3 of covers and frames shall

apply.

4.0 SANTIARY FITTINGS:

4.1.1. All fittings and fixtures shall be of good quality conforming to I.S.

or brand specified or equivalent as approved by Engineer.

4.1.2 Fittings and fixtures shall be installed basically with required basic

accessories as noted in catalogue of manufacturer. All additional or

optional fixtures and fittings shall be as per BOQ or direction of

Engineer.

4.1.3 Method of fixing, fitting and fixtures shall be as per suggestions

given by manufacturers as per drawing and as directed by Engineer.

4.1.4 For general practice, following minimum norms shall be followed.


4.2.0 FITTINGS:

4.2.1 INDIAN WATER CLOSET (IWC): (ORISSA PAN)

It is advisable to provide a sunken RCC floor slab of depth about

500 mm . Required size opening from beam or wall shall be

provided to carry out connection with “P” or “S” trap as per location.

The pan shall be leveled in position keeping top of pan at required

finished level allowing margins for slopes of drain of floor. Pan

shall be concreted with nominal mix of 1:5:10 (1 cement: 5 sand: 10

stone 1 brick aggregate)

This concrete shall be kept 50 to 60 mm below finished floor level to

carry out flooring operation as detailed in flooring section.

The P or S trap, shall be provided with 50 mm seal. Joints between

the trap shall be made leak proof with cement mortar 1:1 (1 cement:

1 fine sand) and lead Pash strip.

After laying the floor, foot rests of specified shall be fixed in

cement mortar 1:3 (1 cement: 3 coarse sand). Location shall be about

175 mm from back side inner edge of the Pan.

4.2.2 FLUSHING SYSTEM:

4.2.2.1 CISTERN:

These shall be high or low level. IWC shall be provided with high

level cistern connected with lead flushing pipe. EWC shall be

provide with low level cistern. High level cistern shall be at 2.0 M

and low level cistern shall be minimum at 300 mm from top of pan.


4.2.2.2 FLUSH PIPE CONNECTION:

I.W.C. pan shall be connected to the cistern by PVC flush pipe of 40

mm dia. Flush pipe shall be fixed to wall with clamps. The flush

pipe shall be connected to closet by means of cement.

The flush pipe securely connected to the cistern outlet by means of

coupling nut made out of non corrosive material.

Low level cistern shall be connected to the closet by means of 40

mm dia white porcelain enameled flush bend / CP bend using Indian

rubber adopter joints. The other specification are same as above.

4.2.3 WASTE FITING FOR SINKS:

The waste fitting shall be of chromium plated brass. The fitting shall

conform to IS: 2863 – 1964 and shall be sound free from laps, blow

holes and pitting and other manufacturing defects. External and

internal surface shall be clean and smooth. The body and the nut

shall be truly machined so that nut smoothly moves on the busy.

The waste pipe of the sink shall be UPVC/Plastic pipes.

4.2.4 BOTTLE TRAP:

Bottle traps for wash basins, shall be deep seal (minimum 6 cm seal)

of 32 mm size cast brass bottle traps, heavy chromium plated. All

bottle traps shall be provided with suitable cleaning eye, extension

pieces, flare nut all chromium plated. Bottle traps shall be of

approved make and design.

CIDCO OF MAHARASHTRA LIMITED SL. PG. NO. C.A. NO. 02/CIDCO/EE(B&U-I)/2010-11 5.0 Stoneware Pipes and Fittings:

5.1 The sale glazed stoneware pipes and fittings shall conform to grade

A class. Surface remaining exposed internally and externally of

pipes and fittings shall be glazed. Pipes shall be sound, free from

fire cracks, hair cracks which impair the strength, durability and

serviceability. The glaze of the pipes and fittings shall be free from

casing. There shall be no broken blisters. The pipes and fittings

shall give dear note when struck with a light hammer. Pipes and

fitting shall conform to I.S. 651-1980.

5.2 The pipes shall be hard, smooth, even textured, truly circular in cross

section, perfectly straight and of standard nominal diameter with

correct depth and diameter of socket.

6.0 Gully Traps:

S.W. gully traps shall conforming to I.S. 651. Gully trap shall be

provided with RCC cover 300 mm x 300 mm and frame. The

minimum weight of cover shall be 4.53 Kg and of frame 2.72 Kg.

RCC cover and frames shall be of good quality free from any defects

and seal faces and edges truly square machined.

7.0 C.I. Pipes:

7.1 PROVIDING, LAYING OF PIPES AND JOINTING :

The Contractor will have to provide pipes and rubber rings after

duly approved by the Engineer-in-charge in a phased programme

immediately after receiving the work order. The pipes with any


defects or cracked pipes shall be immediately replaced by the

Contractor. In order to avoid damage to the pipes especially the

spigot end, the pipe should not be dragged along concrete and

similar hard surfaces. Pipes and specials shall be stacked near to

Contractor’s Chowki / site in a manner so that under no

circumstances inconvenience is caused to other agency to traffic or

casual injury to pedestrains.

7.2 The pipes and specials before laying shall be brushed internally

throughout the length to remove any soil or stones that may have

accumulated therein. Inside of socket and outside of the spigot

shall be thoroughly cleared.

7.3 The pipes shall be lowered in trenches carefully, in straight and

full length as far as possible. Maximum deviation allowed will 2

½% where site condition demand C.I. pipes and specials shall be

allowed to the cut to the required dimensions with the pipe cutting

machines or by hand cut as may directed by the Engineer.

7.4 (a) On lowering the pipe in trenches, they will have to be jointed by

means of rubber rings (tyton joints). The rubber rings of different

diameter are to be procured and transported to the site by the

Contractors. The Contractors are to ensure that only rubber rings

are allowed for Tyton joints. In no circumstances, the Contractor

shall be allowed tolay the pipes in trenches directly. They shall

use ropes and other required supports while laying of pipes.


(b) Jointing :

Before assembling the joint, the spigot of pipe and the

interior of the socket of the adjacent pipe should be thoroughly

cleaned. Insertion of the gasket i.e. (rubber ring) can be facilitated

by the bulb seating inside the socket.

7.5 The gasket should be wiped clean, fluxed and then placed in the

socket with the bulb towards the back of the socket. The groove in

the gasket must be located on the retaining bed in the socket and the

retaining heel of the SBR firmly bedded on its seating.

7.6 It is necessary to ensure that the SBR fits evenly around the whole

circumference removing any bulges which would prevent the proper

entry of the spigot end. In the larger diameters, this operation may

be assisted by forming a second loop in the gasket opposite the first,

then pressing the loops flat one after the other.

7.7 JOINTING OF C.I.PIPES, SPECIALS AND APPURTENANCES

BY LEAD :

The joint between two C.I. Pipes shall be made by the use of rubber

rings (tyton) while any other joint wherein rubber ring can not be

used, (e.g. joint between C.I. pipes and specials) lead joint shall be

made by the contractor as specified.


7.7.1 After the Engineer has checked and certified that pipes, specials and

appurtenances are laid in proper alignment and level, the sterilized

spun yarn of approved quality shall be driven tightly against the

inside base of the socket with suitable tool. A ring of hump rope

covered with clay is wrapped around the pipes at the end of the

socket leaving a hole into which the molten lead shall be poured.

The lead used shall be soft and of approved quality consisting of

99.99% pure on analysis and shall confirm to IS 782 of 1962. The

average consumption of jointing materials shall generally be in

accordance with IS 3114 of 1965 as amended upto date (refer table

No.1 below). The contractor shall bear the expenses of testing the

lead in laboratory if demanded by the engineer. All the jointing

materials, such as spun yarn, pig lead, jointing tools and melting

equipments shall be provided by the contractor.

TABLE NO. 1

LEAD AND SPUN YARN FOR DIFFERENT SIZES OF PIPES

Nominal diameter of pipe

( in mm)

Lead joint ( in kg.)

Depth of lead ( in mm)

Yarn/Joint ( in kg.)

80 1.80 45 0.10 100 2.20 45 0.18 125 2.60 45 0.20 150 3.40 50 0.20 200 5.00 50 0.30 250 6.10 50 0.35 300 7.20 55 0.49 350 8.40 55 0.60 400 9.50 55 0.75


Nominal diameter of pipe

( in mm)

Lead joint ( in kg.)

Depth of lead ( in mm)

Yarn/Joint ( in kg.)

450 14.00 55 0.95 500 19.00 65 1.00 600 20.00 65 1.20 700 22.00 65 1.35

( The quality given above is provisional and 2% variation may be allowed ) 7.7.2 Caulking the joint shall be done after the lead is poured. All excess

lead protruding outside of the socket shall be removed with a flat

chisel and then caulked a number of times (minimum three) all along

the circumferential joints to make the joint sound and watertight.

The joint when completed should be flush, beat and even with the

socket. Where the pipes are not laid in continuous lengths but in

stretches, the open ends of the pipes shall be provided with wooden

plugs covered with Hussein cloth to prevent access to dirt etc. At

certain places for jointing two faces of pipes a collar joint will have

to be provided if directed by the engineer. The collar joint will be

paid under the same rate as for socket and spigot, but one collar joint

will be treated as two joints of the spigot and socket type.

7.7.3 After completion of pipe laying work in whole length or in parts as

decided by the Engineer, the trench shall be partially filled back

except at the joints before taking up the hydraulic test. In each case

the contractor has to close both ends of the section of pipe line to be

tested either by providing cap, blank flange or by sluice valve as per

directions of the engineer. If necessary both the ends shall be


properly anchored by providing 1:2:4 c.c. blocks of required

dimensions. Payment will be made for providing these c.c. blocks

under the respective items. Contractors shall provide required

number of plug points with ferrule of required diameters to serve as

injection points, air relief points etc. On the completion of the test,

these points shall be closed by the plugs by the contractor. No

separate payment will be made for this. The contractor shall make

necessary arrangement to fill the section of main to be tested by

taking suitable size, connection from existing main nearby or from

any other source. The charges for water supplied, for making and

removing connection will have to be borne by the contractor only.

7.7.4 Testing will be carried out by contractors under the guidance of

Engineer. Contractor shall arrange for required machinery,

equipment and technical staff for testing the pipeline. The pipeline

shall be tested for 9 kg/cm2pressure for M.S. lines and 7.5 kg/cm2

pressure for CI pipe line.

If the first test is not found satisfactory, repeated tests after the

necessary repairs will be undertaken and procedure as mentioned

above shall be followed.

7.7.5 When the section of the pipe line is tested successfully, the

contractor shall back fill the portion as per direction of the Engineer.

The cost of testing the pipe line shall be deemed to have been

included in the cost of laying the pipeline and no separate payment

shall be made as referred above.


7.8 Appurtenances :

Appurtenances such as butterfly valve etc. shall be supplied by the

contractor himself and they himself shall make their own

arrangements to purchased will consists of tail pieces and required

number of nuts and bolts, similarly, S.P. hydrants will consists of

body, one S.V. duck foot bend tail piece, nuts and bolts. The rate

includes the cost of transport including loading and unloading,

lowering in trenches and flanged joints alongwith the cost of

material, such as nut-bolts, rubber packing washer etc. which also

shall provided by the contractor without any extra cost.

7.8.1 Before valves & hydrants are fixed, they shall be cleaned and

greased. It should be seen that all the parts are in perfect working

condition. The tail pieces shall be jointed to C.I. Pipes by socket and

spigot joints at both ends or by a collar by means of lead joints and

the cost of making socket and spigot joint and the cost of making

lead joints will be paid under respective items. The cutting of pipes

and specials necessary during the process of the laying will have to

be done by the contractor without any extra cost.

7.8.2 Providing and fixing of blank flanges :

The contractor has to procure blank flanges. The contractor shall fix

them on the pipe ends, wherever necessary and as directed by the

Engineer. (the blank flanges and caps will be required for closing


the needs for testing the pipe lines shall however to be paid for) The

cost of providing and fixing the blank flanges shall include cost of

transport from stores, loading, unloading, cost of all jointing

materials such as nuts,bolts, washers, rubber packing, 3 ply white

zinc etc.

___________________ _______________________________ Signature of Tenderer Additional Chief Engineer (I &NT) Date: Date:


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