White-Rodgers 37C73U-171 Valve 30067439-890 M/R stands for Manual Reset

M/R stands for Manual Reset

technicians can quickly restore independent hot water access for tea or cleaning without interrupting the primary brew cycle

the Reznor 113216 provides reliable vent safety monitoring

this gasket ensures leak-free operation under substantial system pressures and thermal cycles

By ensuring the high limit control activates at the exact factory-calibrated setpoint

White-Rodgers 37C73U-171 Valve 30067439-890 M/R stands for Manual ResetThe White Rodgers 37C73U 171 is a professional grade Natural Gas Water Heater Valve engineered for standard residential tank style heaters. Built with a 2. 5 inch shank for deep tank insulation compatibility, this control provides precise thermal regulation between 70F and 160F. For technicians performing a replacement water heater thermostat install, this unit serves as a direct upgrade for the 37C73U 274 and various A. O. Smith or Rheem OEM