Click on valve with safety relief are made as per the Customers Drawing, specifications and dimensions. The standard size as per EN 15202 We also have Inlet Connection which is 3/4 M.NGT NAD THE PRESSURE IS 26 bar. Click on valve 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.