Amtrol 444 Hydronic Expansion Tank Air Purger

Hydronic Expansion Tank Air Purger is an essential inline air management device for hydronic heating systems. The Amtrol 444 line delivers reliable air removal with an integrated air purger and automatic float vent, keeping your loop free of air pockets and improving efficiency.

Designed for compact in-line installation, it features a 1-1/4 inch nominal size, female threaded end connections, and a 4 inch end-to-end distance, making retrofits straightforward in tight spaces. The durable cast iron body withstands demanding conditions with a 100 PSIG pressure rating and a 240°F temperature rating, ensuring long service life in everyday heating operations. This unit is ideal for hydronic heating systems, expansion tanks, and automatic air vents, helping to prevent air binding, improve pump performance, and reduce noise.

• In-Line installation for easy retrofits
• Nominal Size: 1-1/4 inch
• End Connections: Female Threaded
• End-to-End Distance: 4 inches
• Body: Cast Iron for durability
• Pressure Rating: 100 PSIG
• Temperature Rating: 240°F
• Includes: Air Purger and Automatic Float Vent
• Applications: Hydronic Heating System, Expansion Tank, Automatic Air Vent
• Standards: IAPMORT, ISO 9001/2008