1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Banging pipes - blocked separator?

Discussion in 'Plumbing and Central Heating' started by Doc955, 20 Jan 2012.

  1. Doc955


    29 Jun 2006
    Thanks Received:
    United Kingdom
    Hello all,

    Our CH has recently started making quite voilent banging noises from the boiler/pump/valve pipework. It only seems to do it when the system is getting up to full temperature but there is sometimes also a single big bang as soon as the CH valve closes.
    It's an open S plan with std issue BG valves (Drayton), BG multihead pump (on pos 3), Potterton Promax 24HE boiler feeding 12 rads. It has a combined F&E pipe (22mm) which comes off the air separator (28mm).
    A couple of rads were replaced recently (October) and following this the system was flushed with X400 for about a month which removed plenty of sludge. Once flushed through, it was refilled and X100 added. I fitted a Magnabooster2 at the same time.
    The separator and about 200mm of the F&E pipe will hold a magnet which means it's full of magnetic debris, correct? Could this be the source of the noise and is there any effective way to clean it or is it a chop-out-and-replace job?

  2. Sponsored Links
  3. gas112


    27 Oct 2009
    Thanks Received:
    United Kingdom
    Yep creating a restriction and not letting the water get away from the boiler quick enough so gettin too hot.
    Needs cutting out.
  4. DIYnot Local

    DIYnot Local

    3 Sep 2019
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.

    Are you a trade or supplier? You can create your listing free at DIYnot Local


Share This Page