SC (SELF CLOSING) VALVE DIA 25MM with safety relief are made as per the Customers Drawing, specifications and dimensions. The standard size As per IS8737 We also have Inlet Connection which is 3/4 M.NGT and Outlet Connection is Ø 25 mm. SC (SELF CLOSING) VALVE DIA 25MM have many uses, including controlling water for irrigation, industrial uses for controlling processes, residential uses such as on/off and pressure control to dish and clothes washers and taps in the home.