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

a 3/16-inch fitting is standard for 1/4-inch tubing connections

it offers the flexibility needed for various residential and commercial multi-story layouts

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

This OEM solenoid hardware kit is a professional-grade solution designed to replace worn water lines and internal components that often scale up over several seasons

Zonefirst AOBD-20X8 Damper R-410A This SPDT Pressure Switch (SingleThe 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