replacement of defective accessories of chlorination system under watgunge water treatment plant- 1 supply, delivery, fitting-fixing, testing and commmissioning pressure reducing valve 2 supply, delivery, fitting-fixing, testing and commmissioning complete vacuum regulator with pressure relief valve 3 supply, delivery, fitting-fixing, testing and commmissioning complete drain valve 4 supply, delivery, fitting-fixing, testing and commmissioning lead gasket for 20 nb flang. 5 supply, delivery, fitting-fixing, testing and commmissioning vacuum gauge-760 to dhz 6 supply, delivery, fitting-fixing, testing and commmissioning pressure gauge 0 to 16kg / cm2 7 supply, delivery, fitting-fixing, testing and commmissioning glass tube and float 8 plumbing works ( a ) - ( ii ) g.i. pipe works and fittings 19 ( i ) supplying, fitting and fixing pvc pipes 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 with holder bats clamps, including cutting pipes, making threads, fitting, fixing etc. complete in all respect including cost of all necessary fittings as required, jointing materials and two coats of painting with approved paint in any position above ground. ( payment will be made on the centre line measurements of total pipe line including all specials. no separate payment will be made for accesories, specials. payment for painting will be made seperately ) ( a ) for exposed work pvc pipes ( dia ) ( a ) 15 mm 9 materials and labour etc. ( c ) - ( ii ) cost of materials 12.supply of long screw ( 150 mm long ) of tata make with sockets ( tata make ) and jamnut. ( i ) 15 mm