Sound of air in CH water pipes. Is this normal???

Discussion in 'Plumbers' Talk' started by CosRush, Feb 22, 2010.

  1. CosRush

    CosRush New Member

    When my boiler turns off with the stat having reached its desired temp, after a minute or so there is a very audible sound of water rushing into the pipes at the top of the boiler.

    Its as if there is air in the pipes which then at some point is filled with water. It doesn't do this everytime though the boiler switches off.

    Is this normal and if not, what can I check?
    Should the main feed and return pipes to the boiler have air vents on them?
  2. HOTDOG ø

    HOTDOG ø Active Member

    If you have bled all the rads etc and there is no problems with air then its probably nothing to worry about.

    MR MISTERY ! New Member

    It's air, and should not be there. There are sure to be air vents on the system, it's a case of finding them. Try bleeding air from these when the system is turned off ONLY. You don't say what boiler you have or if the system is sealed or not, so make sure the system is full/up to pressure befor you turn it back on. Failing this call in a Plumber/Heating enginer.
  4. CosRush

    CosRush New Member

    Thanks for the replies.

    The boiler is a wallstar in the wall boiler. The system is a vented type.

    I have had a look in the loft and have 3 pipes as part of the boiler system that have air vents on the top (manual type)

    I will try these and see if any air comes out.
  5. doing a bit

    doing a bit New Member

    if its after the pump stops it could just be the water coming back to the boiler if the boiler is lower than the pump

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice