WATTS 0066132 - VALVE TMP/PRESSUR RELIEF 3/4IN - TEMPERATURE PRESSURE RELIEF VALVES BRONZE SELF-CLOSING SIZE IN=3/4 EXTRA EXTENDED SHANK TEMPERATURE AND PRESSURE RELIEF VALVE IS 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 105,000 BTU/HR. IT FEATURES AN EXTENDED SHANK FOR INSTALLATION ON WATER HEATERS WITH EXTRA THICK INSULATION AS WELL AS A BRONZE BODY WITH NPT MALE INLET AND NPT FEMALE OUTLET CONNECTIONS, UNIQUE THERMOSTAT WITH SPECIAL THERMO-BONDED COATING, AND A TEST LEVER. IT IS SUITABLE FOR WATER HEATERS WITH U - EQUAL TO 1815968