Potable Water Expansion Tanks

5-Year Limited Tank Warranty*

American Expansion Tank

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A properly sized American Expansion Tank eliminates thermal expansion by giving water a place to go when thermal expansion occurs.

  • • For use with residential and commercial water heaters
  • • In-line design,with 3/4" NPTM connection: installs in cold water line of water heater
  • • Field-adjustable 40 PSI air charge
  • • Drawn-steel tank with 2-coat bonded polymer inner lining
  • • Butyl diaphragm, for permanent separation of air and water, with no waterlogging
  • • Maximum Working Pressure: 100 PSI
  • • 2-Gallon (AET-2),5-Gallon (AET-5) and 10-Gallon (AET-10)
  • • 5-Year Limited Warranty

Hydronic Water Expansion Tanks by American Water Heaters

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Download Owner's Manual