Resideo - Honeywell Home AP400

AP400 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 design. The 1-inch threaded inlet/outlet simplifies integration into existing loops, while its robust body resists corrosion and wear in demanding environments. Compatible with most hydronic heating systems, it supports efficient air removal and faster system bleed.

• Durable cast-iron body for long service life
• 1-inch threaded connections for easy integration
• Leak-resistant design minimizes the risk of leaks
• Efficient air purge improves flow and heat delivery
• Compatible with most hydronic heating systems

Whether restoring boiler efficiency or preventing air locks in new installations, the AP400 is a dependable choice for residential and light commercial systems. Enjoy consistent performance and fewer service calls with this high-quality air purger from Honeywell Home.