Precise Calibration: Set to trigger at 150 PSI and 210°F to prevent tank rupture or dry-fire scenarios

preventing short-cycling and protecting the heat exchanger from overheating

When replacing an Oem spark plug wire in a commercial furnace or boiler

which causes pitting

The threaded NPT union inlet and NPT female outlet connections simplify the replacement of HVAC pressure regulators in tight mechanical rooms

Aprilaire 4028 Drain Trap Assembly 323269-701 Precise Calibration: Set to triggerThe Aprilaire 4028 Drain Trap Assembly is a critical replacement component designed specifically for the Aprilaire Model 800, 865, and 866 series steam humidifiers. This professional grade humidifier drain trap kit ensures the efficient removal of condensate, preventing water backup and protecting your HVAC system from potential moisture damage. Engineered for steam humidifier maintenance, the assembly includes a high durability Aprilaire 4028 trap, a