Amtrol Therm-X-Trol Thermal Expansion Tank

Thermal expansion occurs as domestic water is heated. Left unchecked, the resulting pressure increase can cause relief valve discharge and other potentially unsafe conditions. Therm-X-TrolĀ® expansion tanks absorb this expanded water, keeping water pressure at a safe level.

  • Most effective way to control Thermal Expansion
  • Stainless steel system connection
  • Molded, polypropylene liner for maximum corrosion resistance
  • Broadest line of models to fit any application

Water heater manufacturers and plumbing codes require the installation of an expansion control device if a backflow preventor, pressure reducing valve or check valve is installed in the domestic supply line. Therm-X-Trol satisfies all manufacturers’ requirements.



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