supply of upvc fittings for repairing of wta for govt owned and operated dtw under coochbehar ai division , upvc fittings isi marked is 10124 coupler (upvc) , 7-b)200 mmcouplar. , 7-d)140 mm couplar , reducer , 4-a) 200x140 mmreducer (upvc) , tee , 5-a) 200 mm tee. , 5-a) 140 mm tee. , bend , 3-b) 200 mm dia60° bend. , 3-c) 200 mm dia90° bend. , 3-d) 140 mm dia 60° bend. , 3-e) 140 mm dia90° bend , ftp , 2-b) 200 mmftp. , 2-d) 140 mm ftp. , solvent cement. , rubber insertion5 mm thick with proper reinforcement 2 ply conforming to is 638 / 79 with isi marked with latest amendments suitable for raised surface of ms flange as per is 6392/71 (table - 5,11& 17)red jointing sheet as per is 2712 / 1998 grade w/3 fysax amj 321. gasket for raised surface of ms flange as per is 6392/71.( table - 5,11 & 17). 150mm.dia( table -17).