The integrated internal relief valve (IRV) provides critical overpressure protection

The "C" model is the standard economical version

Common Questions & Technical Support What happens if the pressure switch fails to close

Key Benefits Universal Compatibility: Validated for use with all refrigerants and oils without producing false positives in POE systems

If you are servicing an older standing pilot unit

Heil Quaker ICP 1192321 Reversing Valve 321042-401 The integrated internal relief valveThe Heil Quaker ICP 1192321 Reversing Valve is a critical 4 way pilot operated component engineered for heat pump systems requiring precise refrigerant flow control. As a direct replacement for EF17BZ125, this valve ensures seamless integration into existing ICP, Heil, and Quaker units without the need for extensive piping modifications. It comes equipped with a 24v reversing valve coil (50 60 Hz), providing the reliable electromagnetic force