supply and delivery of foot valve leather washer, combined tail piece and flange tail piece required for maintenance of different major rli schemes of different blocks under gangarampur (a.m) sub-division- 1 150 mm dia foot valve leather washer 2 150 mm dia c.i.combine tail piece both end grooved overall length (275+/-15) mm with 7 nos. grooves. material shall be cast iron conforming to grade fg 200 of is 210. one coat of black japan (type-b) conforming to is: 341/1973. casting shall have <12.5 micron surface 3 150 mm dia. c.i tail piece, one ends flanged (23 mm flange thickness), drilled as per is: 6392(table-17) and other end grooved, overall length (175+/-15) mm with 7 nos. grooves. material shall be cast iron conforming to grade fg 200 of is 210. one coat of black japan (type-b) conforming to is: 341/1973. casting shall have <12.5 micron surface