WATTS 0066100 - VALVE TEMP/PRESS RELIEF 3/4IN - TEMPERATURE PRESSURE RELIEF VALVES BRASS SELF-CLOSING SIZE IN=3/4 USED TO PROVIDE AUTOMATIC TEMPERATURE AND PRESSURE PROTECTION TO HOT WATER SUPPLY TANKS AND HOT WATER HEATERS UP TO 105,000 BTU/HR. IT FEATURES A BRONZE BODY WITH NPT MALE INLET AND NPT FEMALE OUTLET CONNECTIONS, UNIQUE THERMOSTAT WITH SPECIAL THERMO-BONDED COATING, AND A TEST LEVER. MODEL 100XL-8 IS ALSO AVAILABLE WITH 8 INCH (200MM) EXTENSION THERMOSTAT. SERIES 100XL IS ASME RATED AND CSA LISTED. TEMPERATURE RELIEF IS 210 DEGREE F (99 DEGREE C), PRESSURE RELIEF RANGE IS 75 TO 150PSI (5.2 TO 10.3 BAR). STANDARD PRESSURE SETTING - EQUAL TO 1816016