Set Of Purge-O-Mat Automatic Float Air Vent Valve And Vacuum Valve For Roof Water Tank. As Per Annexure (1) Purge-O-Mat Automatic Float Air Vent Valve With Shut Off Valve Having Thread Bsp 3/ 8 Inch To Rcf Drg. No. Lw63150, Item-4 Alt-E, Qty- 01 No. (2) Vacuum Valve G -1/2 Inch To Rcf Drg. No. L W63150, Item-3, Alt-E, Qty- 02 Nos. [ Warranty Period: 30 Months After The Date Of Delivery ] ]