Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Checkout our Plumbers Insurance area - heavily discounted Public Liability Insurance and Van Insurance specifically designed for plumbers.

Discuss Expansion Vessel - Not sure abouts its purpose in the Plumbing Forum area at

  1. Rob Foster

    Rob Foster Member

    Can somebody please explain the function of the expansion vessel on my heating. Is it to absorb the increased volume of water when its hot or/and to be a reservoir of water to top up the heating system when there are small drips Many thanks
  2. rpm

    rpm Trusted Plumber

    • Like Like x 2
  3. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    For expansion and contraction eg when your heating system is hot the water expands
    • Agree Agree x 2
Similar Threads - Expansion Vessel sure Forum Date
Expansion vessel connector / pressure valve replacement Central Heating Forum Jul 24, 2018
Expansion vessel - not ugly Plumbers Arms Jul 29, 2018