Resideo - Honeywell Home AP400 Air PurgerAP400 Air Purger from Resideo Honeywell Home is a rugged, 1 inch threaded cast iron air purger designed to remove trapped air from hydronic and radiant heating systems. Built to last, the AP400 delivers reliable purge performance, helping maintain steady flow and efficient heat delivery in residential applications. Engineered for easy installation in tight spaces, this valve features durable cast iron construction and a straightforward, leak resistant

7 A / 3 HP

long-lasting service

with expandable capability to grow with your system

helping streamline operation and reduce downtime while supporting compact installations

1/2 in nominal size with 45° SAE flare ends

Compatible with Split System Air Conditioners and Split System Heat Pumps

Temperature ratings reach 125°F AC / 104°F DC

Compatibility: Uses with F100/F200 Media Air Cleaner

Its fail‑safe spring return

and its compact size (3" W x 2

The design minimizes vibration and running sound while resisting heat and electrical wear in demanding conditions

it performs reliably across environments