Pressure switches must match the manufacturer's exact "WC rating

Key Benefits Safe System Operation: Automatically interrupts combustion cycles to prevent heat exchanger fatigue and potential cracks

While designed for specific York model configurations

The KMC Controls HFO-0027 is primarily used with the CTC-1600 series and similar pneumatic thermostats that utilize a slider-based setpoint adjustment interface

utilizing this OEM replacement kit is the most cost-effective way to address internal leakage or failure to shift

Watts 0315180 Relief Valve Refrigerant Pressure switches must match theThe Watts 0315180 (Series N240X 9) is a heavy duty, automatic reseating temperature and pressure relief valve designed for high capacity protection of commercial water heaters and large scale hot water supply tanks. Featuring a robust bronze body and a 1 inch NPT female inlet outlet, this valve is engineered to manage extreme thermal and overpressure conditions. It provides a massive 4,059,000 BTU hr steam discharge capacity at a 150 psi pressure