Resideo by Honeywell AP400 1-Inch Threaded Cast Iron Air Purger

The Resideo by Honeywell AP400 is a high-efficiency air elimination device designed for hydronic heating and cooling systems. This 1-inch threaded air purger features durable cast iron construction that provides long-lasting performance in residential and light commercial applications.

Key Features:

• Cast iron body construction for durability and corrosion resistance
• 1-inch NPT threaded connections for easy installation
• Coalescing mesh technology captures and removes microbubbles from system water
• Automatic float-operated vent releases trapped air without manual intervention
• Compact design fits in tight mechanical spaces
• Maximum working pressure of 150 PSI
• Operating temperature range: 32°F to 240°F

Air purgers are essential components in closed-loop hydronic systems, preventing air from causing noise, corrosion, and reduced heat transfer efficiency. The AP400 continuously removes both entrained air and dissolved gases, ensuring optimal system performance and extending the life of pumps, boilers, and other mechanical components.