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