Maintenance General Info

What’s the difference between a thermal expansion tank and valve?

Both help manage thermal expansion in your plumbing, but they work differently:

Thermal Expansion Tank:

  • Absorbs expanding water into a bladder as it heats up
  • No water is wasted
  • Maintains steady pressure in your system
  • Requires periodic maintenance (checking air pressure)

Thermal Expansion Valve:

  • Releases excess water to relieve pressure
  • Some water waste occurs
  • Simpler installation
  • Less maintenance required

In most cases, we recommend a thermal expansion tank because it’s more efficient and doesn’t waste water. The right choice depends on your specific plumbing setup – we can help you decide.

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