4.4 Gal. Boiler Expansion Tank with Purge

Features

• For use with closed hydronic heating and cooling systems
• Factory pre-charged to 12 PSI
• Pre-charge should be adjusted to equal minimum operating pressure at tank location
• Accepts expanded water as system temperature rises to reduce pressure build-up
• System connection sets the point of no pressure change
• Water-tight reservoir for expanded water
• Sealed air cushion
• Deep-drawn steel tank
• Air stem for pre-charge adjustment