While designed for R22 refrigerant

When replacing a failed HVAC sequencer

Symptoms often include fluctuating water temperatures

Common Questions Is the P20DB-1 compatible with R-410A systems

Field Serviceability: The tee handle adjustment simplifies on-site calibration without the need for specialized tools in tight mechanical spaces

Carrier 3020450 PRV 320788-702 While designed for R22 refrigerantThe Carrier 3020450 is a high performance pressure relief valve (PRV) designed for critical overpressure protection in commercial HVACR and industrial refrigeration systems. This veteran grade safety component features a 1 2" NPT inlet for robust mounting and a 5 8" SAE flare outlet, ensuring a secure connection to discharge lines. Built with a durable brass body and stainless steel spring internals, this 450 PSI PRV is engineered to withstand harsh