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

significantly improving overall system efficiency

some technician kit variants may feature a hex key hole for added utility during valve disassembly

Common Questions: Is the Danfoss 023Z5064 compatible with older HCFC systems

The Functional Devices TR40VA004 is a versatile 40VA multi-tap power transformer engineered for reliable 24Vac secondary output in demanding HVACR and building automation environments

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