TECHNICAL SPECIFICATION

PLUMBING WORK1.0 SPECIAL CONDITIONS OF CONTRACT

1.1.1 General conditions of contract and special conditions of contract are meant to amplify the specifications, Bill of quantities and drawings in additions those conditions specified from time to time as additions or omissions to conditions of contract. In case of non-conformation general conditions of contract shall supersede special conditions of contract indicated in this document.

1.1 SCOPE OF WORK

1.2 The scope of work comprises supply, installation, commissioning and testing of the water supply, sewerage and drainage systems including sanitary fixtures and fittings, water pumping systems, &water treatment systems and for Proposed Institute for LNM INSTITUTE OF INFORMATION TECHNOLOGY, JAIPUR. The scope of work shall include the following.

(a) External and Internal Drainage system. (b) External and Internal water supply system. (c) Sanitary fixtures and fittings. (d) Water supply pumps &Electrical control panels and related electrical works. (e) Water Treatment System (f) Internal Fire Hydrant System

1.2 SPECIFICATIONS The work shall be executed in accordance with the specifications enclosed, the working drawings, the Bill of quantities and instructions issued from time to time. Wherever these specifications are found wanting in any way, the C.P.W.D. specifications shall apply.

1.3 VERIFICATION AT SITE The Contractor shall verify at the site information regarding existing services, levels, dimensions, etc. as indicated in the drawings and shall remain responsible for the accuracy and maintenance of all dimensions and levels. On verification if any discrepancy is found between what is shown in the drawings and what is actually existing the Contractor before proceeding with further works shall immediately bring the same to the notice of the Engineer- In-Charge.

1.4 PROGRAMME OF WORKS AND METHOD OF CONSTRUCTION

The Contractor shall submit to the Engineer-In-Charge prior to the commencement of work, for his approval, a detailed programme in the format as approved by the Engineer-In-Charge. The detailed programme shall necessarily contain but not limited to all the activities in different phases and in different locations, separately specifying there in the start and end of such activity. However, this submission and subsequent approval shall not relieve the contractor of any of his duties or responsibilities under this contract.

1.5 NOTICE OF OPERATION Inspire of submission and approval of the work programme the contractor shall not carry out any major operation without the consent of the Engineer-in-Charge.

1.6 ORDERING MATERIALS

The Contractor is entirely responsible for assessing the quantities of material to be ordered for using these in permanent works.

1.7 WORK DIARY The Engineer-In-Charge shall keep a diary on the site in which all his remarks, instructions, decisions and the essential details, of the work shall be recorded. The Contractor shall assist in keeping the diary by supplying daily information on the works as required by the Engineer- In-Charge.

1.8 CONSTRUCTION RECORDS

The Contractor shall keep and supply to the Engineer-In-Charge full and accurate records of the dimensions and positions of all new work and any other information necessary for the Engineer -In-Charge.

1.9 SAFETY OF ADJACENT STRUCTURES OF WORKS

The Contractor shall provide and erect to the approval of the Engineer-In-Charge such supports as may be required to protect efficiently all structures or works which may be endangered by the execution of the works or otherwise take such permanent measures as may be required by the Engineer-In-Charge to protect the structures or works.

1.10 KEEPING SITE CLEAN

During the progress of the works and when directed by the Engineer-In-Charge the Contractor shall keep the site clear of all rubbish and debris including that which may be deposited on the site by any sub-contractors until the date of issue of certificate of completion. The cost of keeping the site clean shall be deemed to have been included for in the rates. On completion of the works, the Contractor shall at his own expense clear awayand remove from the site not later than 30 days from the date of completion of works all constructional plant, surplus material, rubbish and temporary works of every kind and leave the entire site and works clean and in a workmanlike condition to the satisfaction of the Engineer-I n-Charge

1.11 LIGHTING FOR WORK

The Contractor shall at all times provide approved lighting as required for the proper execution and supervision of these works.

1.12 PROGRESS REPORT

The Contractor shall submit regular fortnight progress reports to the Engineer-In-Charge in a form as required by him.

1.13 CONTRACT RATES

The Contract rates and prices shall be deemed to; include all labour, materials, use of plant tools, temporary works and buildings, etc. insurance, sales tax, local taxes and duties establishment charges, profit, supervision, transport, testing and other charges and fees and every expense incurred in the proper and due execution, completion and maintenance of the works, and shall be accepted by the Contractor in full satisfaction and discharge of every obligation imposed upon him by these specifications, schedules of items and drawings.

1.14 SHOP DRAWINGS

1.14.1 The Contractor shall prepare and submit to the Engineer-In-Charge for approval, before the work is commenced, all details and installation/ fabrication drawings. These drawings in triplicate must be submitted by the Contractor as soon as possible after the order is placed to give ample time for all parties concerned to study and make comment thereon.

1.14.2 PROGRAMME OF SHOP DRAWING

The Contractor shall provide a detailed programme incorporating production of his shop drawing which can be read in conjunction with the building construction programme.

1.14.3 SHOP DRAWINGS IN COORDINATION OF ALL TRADES

The work described on any shop drawing submitted shall be carefully checked by the contractor for all clearance, field conditions, maintenance of architecture features in proper coordination will all trades on the job. To this end, the Contractor, during the production drawing stage, shall ensure that he coordinates with all other relevant trades that might interfere with the proper installation of his work. No payment shall be made for any variation or alteration on site due to lack of knowledge of other trades. Any unresolved conflict between grades shall be referred to the Engineer-In- Charge. Equipment layouts shall be detailed on the drawings, showing the exact method of installing and clearly illustrating components to be used in making all connections.

1.14.4 APPROVAL OF SHOP DRAWINGS

The Contractor shall submit all drawings as prescribed hereunder. All drawings shall be supplied in 3 copies and signed by a principal of the Contractor.

1.15 AS BUILT DRAWINGS

On completion of work, the Contractor shall submit to the Engineer-In-Charge one original and 2 copies of as built drawings showing:

a) Run of all pipes and diameters under all floors and in vertical stacks. b) Location and sizes of all control valves, access panels and other equipments. c) All other details as mentioned in the relevant paragraphs of the specification

1.16 SAMPLES AND PROTOTYPES The contractor shall submit to the Engineer-In-Charge samples of all materials required for prior approval in writing before placing the order. The Contractor shall also construct prototypes or samples of work as laid down in the contract or as instructed by the Engineer- In-Charge.

Such samples and prototypes after approval shall be retained by the Engineer-In-Charge and shall serve as the standards to be achieved in final construction.

1.17 MATERIAL INSPECTION, EXAMINATION &TESTING All materials and equipment shall be brand new. On arrival of the materials at site they shall be inspected and tested by the Engineer-In-Charge to ensure that the materials conform to the specifications and standards. The Engineer-In-Charge and his representatives shall at all reasonable time have free access to the contractor's/manufacturer’s works. They shall have full powers to examine the materials and workmanship of the equipment at the contractor works or at any other place from where the material or equipment is obtained. The contractor shall give every facility to the Engineer-In-Charge and his representatives and necessary help for inspection, examination &testing of the materials. Original test certificates of the manufacturer's shall be submitted by the Contractor for all major equipment before they are accepted by the Engineer-in-Charge. Acceptance of any material or equipment shall in no way relieve the Contractor of his responsibility for meeting the requirements of the contract.

1.18 PERMITS & LICENSES The Contractor shall obtain all permits and/or licenses if required for any part of the work from the local Authorities and pay for any and all fees required for the same.

1.19 GUARANTEE AND DEFECTS LIABILITY

All Plumbing Works covered by this contract shall be guaranteed by the Contractor against faulty material and workmanship for a period of 12 months (365 days) from the date of virtual completion and taking over by the user. Any part found defective shall be replaced free of all costs by the contractor. The contractor shall guarantee that all Plumbing &Sanitary System work satisfactorily. If performance of equipment during guarantee period is not satisfactory the guarantee period will be extended till satisfactory performance is established for further period of reasonable time decided by the user.

The services of the contractor’s personnel if requisitioned during the defects liability period shall be made available free of any cost to the user. If the defects noticed during the guarantee period are not remedied within a reasonable time and/or some or system as a whole remain out of order for a total period of one month (4weeks), (unless or otherwise extended) the user shall have the right to remedy the defects at the contractor's risk and cost without prejudice to any other rights.

1.20 MAINTENANCE

During the guarantee and defects liability the contractor shall provide at no extra cost, necessary material and personnel to carry out repairs, routine maintenance as required. The contractor shall attend to all problems experienced in the operation of the systems under this

contract within a reasonable time but not more than 48 hours of receiving the complaints and take corrective action immediately.

1.21 TRAINING OF PERSONNEL AT SITE

In order to enable the owner's staff to get acquainted with the operation and maintenance of the system, the contractor at no extra cost to the user shall train the user's personnel during the period of installation, testing, commissioning and prior to virtual completion and taking over by user.

1.22 POWER &WATER

Power &Water for erection, testing and commissioning shall be provided at one point in the building. The contractor shall provide his own submitters and will pay for all electricity and water consumed by him.

1.23 STORAGE OF MATERIALS AND SAFE CUSTODY

Lockable storage space, if available on site shall be made available to the contractor by the owner. However, the contractor shall be responsible for watch and ward and safe custody of his equipment and installations till they are formally taken over by the user. Non availability of lockable storage space due to any reasons shall not relieve the contractor of his contractual obligations in any way.

1.24 INSURANCE

All equipment, materials, machinery and installations as a whole shall be insured by the contractor until virtual completion and take over by the user. Insurance policy should cover for all kinds of erection risks, fire, theft, or loss in transit. All workers and third party shall be insured in accordance with the Workmen Compensation Act in the event of an accident.

1.25 MEASUREMENT

All works shall be measured in accordance with relevant IS Standards not withstanding general or local practices unless where specifically described otherwise in the specific sections of the specifications. All measurements shall be taken by the Engineer-In-Charge representative in the presence of the contractor's authorized representative and shall be jointly signed by both parties. Payments in accordance with the measurements recorded shall be released as per the terms and mode of payment agreed in the contract.

1.26 APPROVAL OF WORK

1.26.1 Contractor shall obtain the approval of all installation done under this contract from the appropriate competent city authority before as well as after completion of all works.

1.26.2 Electrical work done under this contract shall be executed by licensed wiremen under the supervision of licensed electrical supervisor as per requirements of the Indian Electricity act.

2.0 SANITATION WORKS SPECIFICATIONS 2.1 General

2.1.1 Scope of work The scope of work in this subhead comprises supply, installation, commissioning and testing of water supply, sewerage and drainage including sanitary fixtures and fittings. The scope of work includes supply of all materials as per specifications and drawings, laying, fitting, fixing, installation and commissioning the same.

2.2.2 All the water supply and sanitary works shall be carried out by the licensed plumbers approved by the Local Authorities and skilled workmen, experienced in the trade.

2.2.3 All works shall be completely concealed either within shafts or chases or in fills and dropped ceilings unless specifically shown in drawings or required otherwise.

2.2.4 All work shall be adequately protected, to the satisfaction of the Engineer-in-Charge, so that the whole work is free from damage throughout the period of construction up to the time of handing over.

2.2.5 No work shall be covered without approval of the Engineer-in-Charge.

2.2.6 The Contractor shall be responsible for coordinating the work with works of other trades sufficiently ahead of time to avoid unnecessary hold-ups. Hangers, sleeves, recesses, etc. shall be left in time as the work proceeds whether or not these are shown in drawings.

2.1.7 All clamps, screws, brackets, hangers and all miscellaneous steel work needed in the

work shall be fully galvanized.

2.1.8 Only specified brand of material will be used subject to the approval of the sample. The Contractor shall submit as directed by the Engineer-in-Charge samples, manufacturer's drawings, equipment characteristics and capacity data etc. of all equipment, accessories, devices, etc. that he proposes to use in the installation, to the Engineer-in-Charge for approval.

2.1.9 Before the work is handed over, the Contractor shall clean all fixtures removing all plaster, stickers, rust stains and other foreign matter of dis coloration of fixtures, leaving every part in acceptable condition and ready for use, to the satisfaction of the Engineer-in-Charge.

2.1.10 All sanitary ware and fittings shall conform to I.S. standards. The Contractor shall submit samples of all fittings and fixtures proposed to be used to the Engineer-in-Charge for his approval. The approved samples shall remain with the Engineer-in-Charge till the completion of the work.

2.1.11 All workmanship shall conform to Indian Standard Codes of Practice. The fixing and finishing shall be neat, true to level and plumb. Manufacturer's instructions shall be followed closely regarding installation and commissioning. All fixtures shall be protected throughout the progress of the work from damage. Special care shall be taken to prevent damage and scratching of fittings. Tool marks on exposed fixtures shall not be accepted. Protective paper on fixtures shall be removed with hot water only at the final completion of work.

2.1.12 All the water supply and sanitary works shall be carried out strictly as per specifications, ISI codes and CPWD specifications 2002 (VoI.2) with amendments upto date.

2.1.13 Testing

Before any pipe for water supply are painted or covered the same shall be tested to a hydraulic pressure of 1.5 times the working pressure. Pressure shall be maintained for at least 2 hours without appreciable drop in pressure. In addition to the sectional testing of water supply pipes, the Contractor shall test the entire installation on completion of the job to the entire satisfaction of the Engineer-in-Charge. The Contractor shall rectify all leakages and restore damage done to the building and furniture at his own cost.

2.2 WATER SUPPLY

2.2.1 CPVC Pipes & Fittings CPVC Pipes

2.2.2 All pipes upto and including 50 mm diameter for water supply inside and outside the buildings shall be Chlorinated polyvinyl Chloride pipe & fittings fixing by CPVC solvent cement conforming to ASTM F437 & ASTM F438 – Schedule-80 grade as specified in schedule of quantities.

2.2.3 Malleable Cast Iron Fittings All fittings of water supply pipes shall be malleable cast iron fittings as per IS: 1879 Part"(or as revised). All fittings shall have manufacturer's trade mark stamped on it. In the vertical all CPVC pipe will be steel clamped at one meter c/c.

2.2.4 Laying and jointing with CPVC solvent cements of all CPVC pipes, elbow, Tee, Union, Sockets, brass Threaded fittings etc. (External work)

(A) Trenches: -The CPVC pipes and fittings where specified shall be laid in trenches. The widths and depths of the trenches for different diameters of the pipes shall be as in Table below:-

DIA OF PIPE WIDTH OF TRENCH DEPTH OF TRENCH15mm to 50mm 30cm 60cm65mm to 100mm 45cm 75cm

At joints the trench width shall be widened where necessary. The work of excavation refilling shall be done true to line and gradient in accordance with general specifications earth work in trenches.

When excavation is done in rock the bottom shall be cut deep enough to permit the pipes to be laid on a cushion of sand minimum 7.5 cm deep.

(C) Jointing:-The pipes shall be cleaned and cleared of all foreign matter before being laid. In jointing the pipes, the inside of the socket and end of the pipes smoothly and joint with CPVC solvent cement.

(D) Thrust Blocks:- In case of bigger pipes (80mm dia and above) or where the pressure is very high, thrust blocks of cement concrete 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate of 20mm nominal size) shall be constructed on all bends as directed by the Engineer-in-Charge

(E) Testing of Joints

After laying and jointing, the pipes and fittings shall be inspected under working condition of pressure and flow. Any joint found leaking shall be redone and all leaking pipes removed and replaced without extra cost. The pipes and fittings after they are laid shall be tested to hydraulic pressure of 1.5 times the working pressure. The pipes shall be slowly and carefully charged with water allowing all air to escape and avoiding all shock or water hammer. The draw of taps and stop cocks shall then be closed and specified hydraulic pressure shall be applied gradually. Pressure gauge must be accurate and preferably should have been recalibrated before the test. The test pump having been stopped, the test pressure should be maintained without loss for at least two hours. The pipes and fittings shall be tested in sections as the work of laying proceeds, having the joints exposed for inspection during the testing .

(G) Trench Filling :- The pipes shall be laid on a layer of 7.5cm sand and filled upto 15cm above the pipes. The remaining portion of the trench shall then be filled with excavated earth as specified and directed and the surplus earth shall be disposed off as directed.

2.2.6 Cleaning &Disinfection of Pipelines On completion of the hydraulic test and before a pipeline is sterilized, it shall be proved to be free from obstruction, debris and sediment by scouring or by any other process which the Engineer-in-Charge may prescribe.

Upon satisfactory completion of testing and cleaning, the pipelines shall be sterilized as under:

Chorine solution shall be applied at the charging point as the pipeline is being filled and dosing shall be continued until the pipe line is full and at least 50 parts of chlorine per

million parts of the water have been made available and distributed evenly. If ordinary bleaching powder is used, proportions will be 150 gms of powder to 1000 litre of water. If, a proprietary brand of chemical, is used, the proportion shall be as specified by the manufactures.

The treated water shall be left in the pipe line for a period as directed but not exceeding 24 hours. Chlorine residual tests shall be taken at various points along the pipe line. The sterilization process shall be repeated until the samples of water taken from the pipeline are declared fit for human consumption by a recognized laboratory

2.2.12 Pipe Hangers and Brackets for suspended pipes Sturdy hangers, brackets and caddies shall be installed to support all pipe lengths which are not embedded over their entire runs. The hangers and brackets shall be fabricated from suitable MS rolled sections. The hangers and brackets shall be of adjustable I heights and painted with red oxide primer and one coat of oil paint of approved colour. Clamps, coils and saddles to hold pipes shall be provided with suitable gaskets. The brackets and hangers shall be of design as approved by the Engineer-in-Charge.

2.3 SEWERAGE AND STORM WATER DRAINAGE

2.3.2 Cement Concrete Pipes:

(A) General

The pipes shall be with reinforcement as required and shall be of specified class. These shall conform to IS:458-1988. The reinforced cement concrete pipes shall be manufactured by centrifugal (or spun) process. All pipes shall be true to shape, straight, perfectly sound and free from cracks and flaws. The external and internal surface of the pipes shall be free from defects resulting from imperfect grading of the aggregate mixing.

(B) Laying - All RGG pipes shall be laid on a bed of 15cm thick cement concrete 1:5:10 mixojecting on each side of the pipe to the full width of the trench and shall be concreted at the sides up to the level ofthe centre of the pipe and sloped off fromthe edges to meet the pipe tangentially. Pipes shall be laid true to line and grade or specified.Laying of pipes shallproceed upgrade of a slope.

(C) Jointing After setting out the pipes the collar shall be centered over the joint and filled inwith tarred gasket, till sufficient space is left on either side of the collar to receive the mortar. This space shall then be filled with cement mortar 1: 1 (1 cement: 1 coarse sand) and caulked by means of proper tools. All joints shall be finished atan angle of 45 degree to the longitudinal axis of the pipe on both sides of thecollar. The joints shall be cured for at least 4 days.

(H) Testing Pipes and joints shall be subjected to a test pressure of 1.5 m head of water at the highest point of section under test for two hours without developing leaks/falls in

pressures. If any leakage is observed, it shall be made good and test repeated till achieving satisfactory results. Any defective pipes shall be replaced.

The joints shall remain exposed until the testing has been completed.2.3.3 Manholes/Chambers/Catch pits

(A) General The contractor shall construct all manholes, chambers, etc. in 75 class brick-work to such levels, dimensions and specifications as shown on the drawings or 'as specified in the Bill of Quantities.

(8) Masonry Work All masonry and plastering work shall be done as per specifications as stated in Civil works. All manholes shall be plastered inside with cement mortar 1:3 (1 cement: 3 sand) mixed with water proofing compound finished with a floating coat of neat cement. Manholes shall be plastered outside 150mm from the bottom of top slab with cement mortar 1:4 (1 cement: 4 sand) mixed with water proofing compound.

(C) Base Concrete All manholes shall have a base of cement concrete 1:4:8 (1 cement: 4 sand: 8 aggregates) 200 mm thick or as shown on drawings. Channeling and benching shall be formed to the full depth of the diameter of the pipe with cement concrete 1:2:4 (1 cement 2 sand: 4 aggregate) finished with a floating coat of neat cement.

(E) Fixing of C.I. frame for manhole cover

C.1. frames for manhole cover of the specified size and weight shall be embedded in reinforced cement concrete slab 1 :2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20 mm nominal size) 15 cm thick. Reinforcement shall be done as detailed in the drawings.

The reinforced cement concrete slab shall be plastered after fixing of the frame underneath with 12 mm thick cement mortar 1:3 (1 cement: 3 fine sand) and finished on top with a floating coat of neat cement mortar.

(F) Manhole cover &Frames

Size of manholes and weight and size of cover shall be as follows unless otherwise specified in the Bill of Quantities. All manholes covers shall fit properly and bed evenly without racking in their frames. Covers shall be sealed with grease upon final completion and testing.

(G) Lifting Keys

A set of lifting keys shall be supplied by the Contractor.

2.3.4 Gully Traps

(A) General

Gully traps shall be of salt glazed stoneware conforming to I.S. 651 (or as revised). It shall be provided with a water tight C.I. frame and cover 300 x 300 mm inside, the cover weighing not less than 4.53 kg and the frame not less than 2.72 kg. These shall be housed in masonry chambers of 300 x 300 mm internal size.

The masonry chamber shall be constructed in 75 class brick in cement mortar 1:5 mix (1 cement: 5 fine sand) with a 10 cm brickwork round the gully trap from the top of the bed concrete up to ground level. The space between the chamber walls and the gully trap shall be filled with cement concrete 1:5: 1 0 (1 cement: 5 fine

Sand: 10 graded stone aggregate 40 mm nominal size). It will be plastered inside with cement mortar 1:3 (1 cement: 3 coarse sand) finished with a floating coat of neat cement.

C.I. cover with frame shall be fixed on the top of brick masonry with cement concrete 1:2:4 (1 cement: 2 coarse sand 4 graded stone aggregate 20 mm nominal size) and rendered smooth.

Cement concrete in bed shall be 10 cm thick and 1:5:10 mix (1 cement: 5 fine sand: 10 graded stone aggregate 40 mm nominal size), projecting 7.5 cm outside the chamber walls.

2.3.5 Excavation for Sewers/Storm Water Drains

(A) Alignment and Grading The drains are to be laid to alignment and gradients shown on the drawings but subject to such modifications as shall be ordered by the Engineer-in-Charge from time to time to meet the requirements of the works. No deviations from the lines, depths of cuttings or gradients of drains shown on the plans and sections shall be permitted except by the express direction in writing of the Engineer-in-Charge.

(B) Excavation in Tunnels

The excavation for drainage works shall be open cutting unless the permission of the Engineer-in-Charge for the ground to be tunneled is obtained in writing. Where drains have to be constructed along narrow passages, the Engineer-in- Charge may order the excavation to be made partly in open cut and partly in tunnel and in such cases, the excavated soil shall be removed at once so as not to block up the passage and shall be brought back later on for refilling of the trenches or tunnels.

(C) Obstruction of Roads The Contractor shall not occupy or obstruct by his operation more than one half of the width of any road or street and if the space is insufficient, for public and private transit, he shall remove the materials excavated and bring them back again when the trench is required to be refilled at no extra cost to the corporation. The contractor shall obtain the consent of the Engineer-in-Charge as well as from local Municipality or any other

appropriate Authorities in writing before closing of roads to vehicular traffic. The footpaths/sidewalks must be kept clear at all times.

(D) Removal of Filth All night soil, filth or any other offensive matter met with during the execution of the works, immediately after it is taken out of any trench, sewer or cess-pool, shall not be deposited upon the surface of any street where it is likely to cause nuisance or passed into any sewer or drain but shall be at once put into carts and removed to a suitable place as approved by the local Municipality or any other appropriate authority.

(E) Excavation to be taken to Proper depths

The trenches shall be excavated to such a depth that the pipes shall rest evenly on prepared bed as described in the several clauses relating thereto and so that the inverts may be at the levels shown in drawings. In bad ground, the Engineer- in-Charge may order the Contractor to excavate to a greater depth than that shown on the drawings and to fill up the excavation to the level of the drain with concrete, broken stone, gravel or other materials. Any such extra excavation and concrete shall be paid extra at the rate laid down for such works in the schedule, but if the Contractor should excavate the trench to a greater depth than is required without a specific order to that effect in writing of the Engineer-in-Charge, the extra depth shall have to be filled up with concrete at the Contractor's own cost and charges to the requirements and satisfaction of the Engineer-in-Charge.

(F) Refilling

After the pipes has been laid and proved to be watertight, the trench or other excavations shall be refilled. Utmost care shall be taken in doing this, so that no damage shall be caused to the sewer and other permanent work. The filling in the haunches and up to 75 mm above the crown of the pipe, shall consist of the finest selected materials placed carefully in 20 cm layers and flooded and consolidated. After this has been laid, the trench and other excavation shall be filled carefully in 20 cm layers with materials taken from the excavation, each layer being watered for proper consolidation, unless the Engineer-in-Charge shall otherwise direct.

(G) Contractors to restore settlements and damages

The Contractor shall, at his own cost and charges make good promptly during the whole period the works are in hand, any settlements that may occur in the surfaces of roads, beams, footpaths, gardens, open spaces, etc., whether public or private, caused by his trenches or his other excavations and he shall be liable for any accidents caused thereby. He shall also, at his own expense and charges, repair and make good any damage done to buildings and other property. If in the opinion of the Engineer-in-Charge he fails to make good or pay or satisfy the expenses of making good such works with all packable dispatch, the Engineer-in- Charge shall be at liberty to get the work done by other means and the expenses thereof shall be paid by the Contractor and deducted from any money that may be or become due to him or recovered from him in any other manner according to the law of the land.

(H) Disposal of Surplus Soil

The Contractor shall, at his own costs and charges, provide places for disposal of all surplus materials not required to be used on the works. As each trench is refilled, the surplus soil shall be immediately removed, the surface properly restored and road-ways and sides left clear.

(I) Timbering of Trenches

The Contractor shall at all times support efficiently and effectively the sides of the trenches and other excavations by suitable timbering, piling and sheeting and they shall be close-timbered in loose or sandy strata and below the surface of the subsoil water level, without any extra cost. All timbering, sheeting and piling with their walling, and supports shall be of adequate dimensions and strength and fully braced and strutted so that no risk of collapse or subsidence of the walls of the trench shall take place. The Contractor shall be held responsible and accountable for the sufficiency of all timbering, bracing, sheeting and piling used for, all damage to persons and property resulting from the improper quality, strength, placing, maintaining or removing of the same.

(J) Shoring of Buildings

The Contractor shall shore up all buildings, walls and other structures, the stability of which is liable to be endangered by the execution of the work and shall be fully responsible for all damages to persons or property resulting from any accident to any of such buildings.

(K) Removal of Water from Trenches, etc.

The Contractor shall at all times during the progress of work keep the trenches and excavations free from water which shall be disposed of by him in a manner as will neither cause injury to the public health nor to the public or private property nor to the work completed or in progress nor to the surface of any roads or streets, nor cause any interference with the use of the same by the public. The Contractor shall not be paid any extra for dewatering of the trenches.

(L) Width of Trenches

Width of the trenches shall be generally pipe diameter plus 45 cm, if not otherwise required or directed by the Engineer-in-Charge.

2.4 SOIL, WASTE AND VENT AND RAIN WATER PIPES AND FITTINGS.

2.4.1 Cast Iron Pipes and Fittings

(A) Cast iron pipes &fittings to 18:3989 shall be used for soil, waste and vent pipes. Pipes and fittings with irregular bore, blow holes and other manufacturing defects shall not be allowed to be used for work.

All fittings shall be of the degree specified or as required at site.

(B) All cast iron soil, waste, vent and rain water pipes used at basement in exposed condition or where specified shall be centrifugally cast spun iron class (LA) pipes conforming to 18-1536. These shall be with spigot and socket ends. The fittings for centrifugally cast spun iron pipes conform to 18-1538.

2.4.2 Holder bat clamps shall be of a standard design fabricated from M.S. galvanized flat 32 x

1.5mm thick and 12mm dia. M.S. bar and 6mm nuts and bolts. Holder bat clamps shall be fixed in cement concrete (1:2:4) blocks 100 x 100 x 100mm.

2.4.3 M.S. stays and clamps The clamps shall be made from 1.5mm thick M8 flat of 32mm width, bent to the required shape and size to fit tightly on the socket, when tightened with screw bolts. It shall be formed of two semi-circular pieces with flanged ends on both sides with holes to fit in the screws, bolts and nuts, 40mm long. The stay shall be minimum one meter long of 10mm dia M8 bar. One end of the stay shall be bent for embedding in the wall in cement concrete block of size 20 x 20 x 10cm in 1 :2:4 mix (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size). The concrete shall be finished to match with the surrounding surface.

2.4.4 Floor Traps

Floor traps shall be cast iron deep seal type P or 8 traps with a minimum seal of 75 mm. They shall be with or without vent. All traps shall be set in cement concrete blocks 1 :2:4 mix without additional cost. Traps shall be provided with CP brass cockroach trap with screwed down or hinged grating. Traps shall be provided with suitable extension piece where required with CP brass grating to flush with the floor without any extra cost.

2.4.5 Paintings

All pipes in ducts and exposed positions shall be painted with two coats of synthetic enamel paint of color approved by Engineer-in-Charge over a coat of primer of approved quality.

2.4.6 Cement concrete

All soil and waste pipes below ground floor fills and in wall chases (but not in open ducts) shall be supported and covered with 75 mm cement concrete 1:2:4 in bed and all around. Encasement of such pipes shall be done after testing of pipes.

2.4.7 Cutting and Making good

All pipes shall be fixed and tested as building work proceeds. Cutting and chasing shall be kept to minimum. No extra shall be allowed for cutting holes, chases, etc. in walls and floors.

2.4.8 Jointing

All joints for CI soil waste &vent pipes conforming to IS-3989 shall be made with malleable pig lead and spun yarn. Pig lead shall conform to IS:782 for caulking. Spun yarn shall be of clean hemp and of good quality. It shall be soaked in hot coal-tar or bitumen and cooled before use. The quantity of lead to be filled per joint in various sizes of cast iron drainage pipes shall be as follows:

50mm dia = 0.75 kg 80mm dia = 0.80 kg 100mm dia = 0.90 kg 150mm dia = 1.60 kg

The joints for all CI centrifugally cast (Spun) iron pipes conforming to IS-1536 and fittings conforming to IS-1538 shall be made with pig lead. The quantity of lead per joint in various sizes of these pipes shall be as follows:

50 mm dia = 1.8 kg 100mm dia = 2.2 kg150mm dia = 3.4 kg200mm dia = 5 kg

2.4.9 Testing

All soil, waste and vent pipes shall be tested by filling up the whole or part of stack with water. All openings for connections, etc. shall be suitably plugged. Contractor shall remove and replace all pipes having holes, cracks, etc. All leaking joints and access doors shall be replaced or remade to the entire satisfaction of the Engineer- in-Charge. Water shall be retained in stack for a maximum period of 2 hours. After all plumbing fixtures are installed; Contractor shall apply the smoke test to the entire stack to the satisfaction of the Engineer-in-Charge.

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 burnt shall be greasy cotton waste which gives out a clear pungent smoke easily detectable by sight as well as by smell if there is leak at any point of the drain.

2.6. LIST OF APRROVED MAKES FOR PLUMBING & SANITATION MATERIALS

Engineer in-charge reserve the right to select the any of brand listed of approved makes. Contractor to be obtain written approval of brand and model prior to procurement of material.

S. No MATERIALS BRAND NAMEWATER SUPPLY

1. CPVC PIPES - ASHIRVAD/ ASTRAL2. CPVC PLAN & BRASS THREADED FITTINGS - ASHIRVAD/ ASTRAL3. UPVC PIPE & FITTINGS

FOR RAIN WATER & WASTE LINE - ASHIRVAD/ ASTRAL4. CPVC BALL VALVE - ASHIRVAD/ ASTRAL

SANITARYWARE & CP FITTINGS5. VITREOUS CHINA & FIRE CLAY - CERA6. PLASTIC W.C. SEAT - CERA/ COMMANDER/ DIPLOMAT7. C.P. FITTINGS & ACCESSORIES - ESS ESS (CROMA Series)8. C.P. WASTE, SPREADERS, - ESS ESS URINAL FLUSH PIPE9. BRASS BALL VALVE - ZOLOTO10. RCC PIPES - PRAGATI CONCRETE UDHYOG/ JAIN SPUN PIPE CO. /AGRAWAL SPUN

PIPE11. STONEWARE PIPE & GULLY TRAPS - PERFECT/ BURN/ RK12. CI MANHOLE COVER & FRAME - NECCO/ RIF/ BC13. FASTNERS - HILTI

FIRE HYDRANT EQUIPMENTS14. MS PIPE - TATA / JINDAL15. FHC EQUIPMENTS - MINIMAX

GEYSERS14. 50 LTR HOT WATER STORAGE GEYSER - Venus/Bajaj (Glass lined Tanks)

Vendor is required to obtain approval from the Engineer –in Charge before making any procurement. Engineer –in charge may seek detail technical information/sample/ visit to the location of manufacturing before granting any such approval. The contractor shall arrange for technical information/sample/ visit at his cost.