Aprilaire 4592 Airflow Proving Switch 318172-701 As a factory-authorized Bard replacement

As a factory-authorized Bard replacement part

Durable Bellows Design: Built to provide repeatable linear movement

it provides the necessary compression to offset flange irregularities

this Danfoss solenoid valve coil provides stable actuation for EV210B

While originally designed for modern EarthPure (R-410A) systems

Aprilaire 4592 Airflow Proving Switch 318172-701 As a factory-authorized Bard replacementThe Aprilaire 4592 Airflow Proving Switch is a genuine OEM airflow safety switch engineered to provide precision monitoring of pressure differentials within your HVAC system. This Aprilaire model 4592 serves as a critical differential pressure switch, ensuring that secondary equipment like whole home humidifiers or electronic air cleaners only activate when proper blower operation is detected. By acting as an HVAC airflow sensor, it prevents equipment