This RPZ backflow preventer is a direct replacement for 0387121 and the 909QT-3/4 series

this kit provides the precise regulation required to ensure the outdoor fan and auxiliary heat engage correctly during the cycle

Key Benefits: Precise Pressure Calibrated: Features a factory-set 670 PSI trip point and a 470 PSI reset point for accurate high-pressure protection

Featuring a 19' 8-2/5" PVC cable

Always verify the part number against your specific unit nomenclature and wiring diagram

Daikin-McQuay 735045817 Relief Valve R-407C This RPZ backflow preventer isThe Daikin McQuay 735045817 Relief Valve is a critical safety component engineered for high pressure HVACR environments, specifically optimized for chiller and refrigeration systems. This straight design relief valve is factory set to a 200 PSI pressure rating, providing a precise mechanical response to over pressurization events. As an OEM replacement part, it ensures seamless integration and maintains the system's operational integrity by venting