Work for Repair and Preventive Maintenance of pipelines (leakages and pollution control) including Daily Operation of Valves of Water Supply Schemes at Gopalbari Chowki under the jurisdiction of City Sub Division-IV (South), Jyoti Nagar, Jaipur.

Maintenance of pipelines irrespective of size and material which includes repairing of bursts and leakages, pollution control, survey and removal of choking, disconnection of illegal connections, collection and recording minimum 10 nos. residual chlorine samples during daily supply timings, interconnections and all works related to pipeline network in existing distribution/ rising main pipelines of all sizes by digging out suitable size of pit in soft and loose soil/ hard soil including cutting of black top, WBM and CC top of road of any size at work site. This will also include cutting of pipe ends, fixing of pipe piece with jjointing material to make repair leak proof and refilling of pit by excavated sand by ramming it at sides of pipes and upto ground level. For entire job, contractor will use their own T&P. Contractor with his own resources shall arrange de-watering, JCB and tractor compressor if any and restore any amenity at his own cost damaged while performing the work in this item. The work includes daily patrolling and repairs the leakages within stipulated time and completes maintenance of pipeline network of rising and distribution pipeline network within the scope of work for per km pipeline per month. Jointing material shall be provided by the department. Minimum labour for a following kms pipelines to be deployed:

101 km to 200 km - Two fitter-II & four beldar (length of pipeline 112 kms X 12 months = 1344)

Daily/ periodical operation of valves at supply times for specified by department per sluice valve per month. (valve rod and cap to be arranged by contractor)

80-300 mm (Valve 4 X 12 months = 48)

350-800 mm (Valve 3 X 12 months = 36)

Providing Household Tap Connection as per technical specification and approved drawing and as per relevant IS code (amended up to date) from HDPE pipe line up to consumer meter/premises by using electro fusion saddle piece (Complete job).This job includes digging out suitable size of pits and trench for laying service line in all kinds of soil; depositing and refilling of pit & jhiri with watering & ramming /compacting in layers and disposal of surplus excavated soil as directed with in a lead of 100 meter ; providing & fixing of all fitting duly approved in accordance with specification for potable water including electrofusion saddle piece, gunmetal ferrule 4.0 mm , GM Full-way Valve (IS:778 Mark) or wheel valve and specials, below ground level 20 mm nominal dia MDPE pipe PE 80 PN 16 as per ISO 4427 / 20 mm nominal dia PPR-C (Three layered) pipe PN16 SDR 7.4 (IS:15801:2008) (ISI mark) for and above ground level using 20 mm dia PPR-C pipe with standard PPR fittings/ 15 mm dia GI pipes with fittings in the premises for fixing a tap / meterbox (excluding) ,including accessories with flushing, cleaning, disinfecting and testing of pipe line complete required for making of service connection complete in all respect including labour charges . The service line should be laid at least 45 cm below ground level. Note: Road cut and restoration is not part of this item and paid seperately.

For connection with 20 mm dia MDPE/PPR-C pipe length up to 05 mtr.

Road cutting for house hold service connection in minimum trench width whereever road crossing is required. Road cutting of cement concrete, WBM, Black top etc. of all thickness shall be done by using a concrete cutter machine keeping minimum trench width and restoration of the road with Cement concrete with PCC M-10 and CC M-30 grade as per specification and direction of Engineer in charge.

Add extra over item no 1.21 & 1.22 for providing 20 mm PE 80 PN 16 as per ISO 4427 MDPE pipe including excavation, providing, laying & jointing of service line above 5.00 mtr.

Providing and laying in position cement concrete M10 grade nominal mix 1:3:6 (1 Cement : 3coarse sand : 6 graded stone aggregate 40 mm nominal size) in base course complete including all material, labour, machinery, lighting, guarding for road restoration work in trenches of pipe line and chamber work. Measurement for CC work to be made as per standard trench width specified in tender document and no extra payment shall be made be made for trench width more than specified, complete work as per technical specification and scope of work.

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