Water Locking Unit 1/2 Inch Designed For Pneumatic Pressurized Flushing System As Per Adden Dum-1 Of Mmdts 19027 Rev 01 Oasis Ofepps10000-2 Or Equivalent. Equivalent Means It Should Functionall Y Compatible In Pressured Flushing System Of Indian Railway Coaches Fitted With Pressurized Flushing Syste M. Material Of Unit Shall Be Of Stainless Steel As Per Aisi-304 Accepted As Per Tender [ Warranty Perio D: 30 Months After The Date Of Delivery ] ]