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M/R stands for Manual Reset
Spring Return Reliability: Mechanical fail-safe ensures dampers return to their original position during power interruptions
6 Amps during the ignition phase
27-degree pitch
and heat pump applications requiring reliable refrigerant metering
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