If you are servicing 3/4-inch or 1-1/4-inch valves

Solid core desiccant provides maximum moisture adsorption and acid neutralization to protect the compressor from chemical damage

Refrigerant # Cntrl

This part acts as the primary motor support bracket

This SPDT Pressure Switch (Single Pole Double Throw) functions as a direct OEM replacement part for the now-obsolete PRS3406

Zonefirst AOBD-20X8 Damper R-410A If you are servicing 3/4-inchThe Zonefirst AOBD 20X8 is a high performance automatic opposed blade damper designed for precision airflow management in commercial and residential HVAC zoning. This 20" x 8" unit features a robust 24Vac power open power closed actuator, requiring a 3 wire connection for positive drive control in both directions. Unlike standard gravity or spring return models, the AOBD 20X8 side mount damper utilizes a synchronous motor that draws power only during