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 1/8 To Rcf Drg.No.Lw 63150 Alt E, Item No-4, Qty/Kit-01 No.2 Vaccum Valve G-1/2 To Rcf Drg. No.Lw. 63150 Alt E, Item No.-3, Qty/Kit-2 Nos.