Safety Relief Valve; Applicable Standard ASME HV Sec IV, ISO 9001; Inlet Size 3/4"; Outlet Size 3/4"; End Connection Female Threaded x Female Threaded; Body Material Brass or ASTM B584 Bronze; Spring Material Stainless Steel; Seat Material EPDM; Set Pressure Range 15 to 60 PSIG; Temperature Rating 250 Deg F; Inclusions/Features Stainless Steel Spring; Application Ideal for Use with Hot Water Boilers and Hydronic Heating System; Weight 1.15 Lb; Warranty 5 Year