89 /WBTDCC/IV-123 /25-26(SL-3)

Labour for boring tube well of required dia. by water jet system through any type of soil strata including hire and labour charges for boring pipes, scaffolding, tools and plants as necessary and taking out them and lowering pipes, strainers, blind pipe etc. and fitting and fixing the same complete including bucket washing and other incidental works in the connection. The tube well should have a minimum 50 mm gap in between the outside of the tubewell pipe and the bore.(d) For depth upto 150 metre for 50 mm dia. tube well with top enlargement of 100 mm dia.(ii) 100 mm dia. boring etc. top enlargement

Supplying, fitting and fixing PVC pipes for underground work of approved make of Schedule 80 (medium duty) conforming to ASTMD - 1785 and threaded to match with GI Pipes as per IS : 1239 (Part - I). with all necessary accessories, specials viz. socket, bend, tee, union, cross, elbo, nipple, longscrew, reducing socket, reducing tee, short piece etc. fitted including cost of all materials ,jointing materials, cutting pipes, making threads ,cutting trenches upto 1.5 metre below surface in all sorts of soil and refilling the same as directed complete in all respect. (Payment ill be made on the centre line measurement of the total pipe line including all specials No separate payment will be made for accessories, specials.) PVC Pipes 100 mm

Supplying high density polythene strainer of approved make with adapter conforming to I.S. specifications.(ii) 100 mm dia.

Supplying, fitting and fixing plug of approved make conforming to I.S. specifications. (ii) 50 mm

Supplying,fitting and fixing check valve (horizontal) G.M. tested to 21 kg per sq. cm. (vi) 50 mm

Supplying, fitting and fixing heavy type bell mouth reducing socket. (i) 50 mm X 100 mm

Supplying, fitting and fixing 300 mm M.S. housing clamp of approved quality.

Washing and developing tube well with air compressor pump and engine for 8 (eight) hours continuous pumping per day with necessary arrangements for testing the yield in gallons per hour with 'V' notch including hire and labour charges for all tools and plants and scaffoldingas required.

Packing the annular space between the outside of the tube well pipes & strainers and the bore with pea size washed gravel of approved quality having size from 2 mm to 5 mm or the size approved by the Engineer-inchargeincluding cost of all materials labour and equipment complete.

Supplying P.V.C. water storage tank of approved quality with closed top with lid (Black) - Multilayer (d) 2000 litre capacity