Williams P500406 Limit Switch Made in the USA kit

Made in the USA kit is the professional standard for preventative maintenance and verifying successful system cleanup after acidic contamination treatment

Is the mounting orientation critical for performance

the Danfoss NRV series delivers the hermetic seal and durability required for modern high-pressure systems

Are these compatible with both ASME and non-ASME headers

Williams P500406 Limit Switch Made in the USA kitThe Williams P500406 Limit Switch is a critical safety component designed for precise thermal regulation in Williams Monterey top vent heaters and furnace gas valves. Engineered with a 270 degree Fahrenheit Cut Out, this Manual Reset (M R) limit switch serves as a reliable failsafe, interrupting the electrical circuit to the gas valve if internal temperatures exceed safe operating parameters. This specific HVAC high limit control is essential for