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Thermal Expansion Bladder Tanks

TXA familyWessels type TXA thermal expansion tanks are designed for use on potable hot water systems to absorb expanded water and prevent the dangerous buildup of pressure. As the water is heated, thermal expansion occurs the water is forced into the precharged thermal tank. The precharged air cushion returns water to system when delivery is required at various fixtures. This arrangement prevents unnecessary relief valve operation, which results in wasted water and energy costs, and eliminates potential internal component damage to water heaters.

All Wessels thermal tanks come equipped with removable, heavy duty Butyl diaphragms and a stainless steel system connection. Wessels thermal tanks are used for residential, institutional, industrial and commercial applications.

Size Your Tank

Were you looking for a non-replaceable thermal bladder tank?


ASME StampTXA Series (ASME)

The TXA is one of the industry’s most robust bladder style tanks with a range of features that include:

  • Heavy-duty replaceable Butyl bladder
  • Sizes range from 10 to 528 gallons
  • Working pressures of 150 PSI (std), 200 and 250 PSI

The TXA bladder style tanks boast many advantages over other style thermal expansion tanks.

  • Can be easily replaced in the field
  • Free standing models have a system connection at the bottom of the tank
  • Designed to prevent any harmful build-up of dirt, grit or system contaminants
  • Easy draining to assist in establishing proper air charge

TXA 35-800L
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TXA 1000-15000
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TX Series (Non-ASME)

Non asme
The TX Series tanks are designed for use in low pressure residential systems and in light commercial systems where ASME construction is not required.

  • Heavy-duty replaceable Butyl bladder
  • Sizes range from 2 to 80 gallons
  • Factory pre-charged to 40 PSIG (field adjustable)
  • Rated for 200°F operation

Download submittal