Hydronic Water Expansion Tanks

1-Year Limited Tank Warranty*

Hydronic Water Expansion Tanks by American Water Heaters

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American Expansion Tanks for closed space heating systems provide a place for expanding water to go during cycles of thermal expansion, eliminating the risk of damage to the boiler and piping in the system.

Features:
  • • For use with space heating boilers in closed systems — not for use with potable water heating systems
  • • Models up to 14.6 gallons feature in-line design for installation directly into system piping
  • • Field-adjustable 12 PSI air charge
  • • Drawn-steel tank
  • • Butyl diaphragm, for permanent separation of air and water, with no waterlogging
  • • Maximum Working Pressure: 100 PSI
  • • Maximum Temperature: 240°F
  • • 1-Year Limited Warranty


Hydronic Water Expansion Tank Sizing Chart by American Water Heaters

Download Spec Sheet

Download Owner's Manual