Tenders for Supply of Set Of Purg-O-Mat Automatic Float Air Vent Valve For Roof Water Tank And Vaccum Valve :-1 Purg-O-Mat Automatic Float Air Vent Valve With Shut-Off Valve Having Thread Bsp 3/8 To Rcfs Drg. No. Lw 63150, Item No.-4, Alt. No.-E, Qty/Kit-01 No. 2 Vaccum Valve G1/2 To Rcfs Drg. No. Lw 63150, Item No.-3, Alt. No.-E. Qty/Kit-2 Nos.