Series 1 L, 1XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 15 000 B.T.U./HR. They feature a bronze (brass) body with N.P.T. threaded male inlet and N.P.T. threaded female outlet connections, unique thermostat with special thermo-bonded coating and test lever. Series 1 L, 1XL are CSA listed . Model 1 L has 2 in. (50 mm) thermostat and a test lever. Model 1XL has an extension thermostat. Temperature Relief: 210°F (99°C). Pressure Relief Range: 75 to 150 P.S.I. Standard Pressure Settings: 75, 100, 125, or 150 P.S.I.