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    • ST1991
    • By ST1991 8th Feb 18, 5:26 PM
    • 409Posts
    • 222Thanks
    Should i flush an old boiler...?
    • #1
    • 8th Feb 18, 5:26 PM
    Should i flush an old boiler...? 8th Feb 18 at 5:26 PM
    We have a Valliant (model unknown) which is 30+ years old. Water gets lovely and hot from the tap, and doesnt take long to get scalding hot.

    The radiators get warm, but some get hotter than others. The one in the bathroom only just gets warm.
    There is no heat difference between the top/bottom of the radiators that aren't heating up well, so i don't think they need bleeding.

    Would it be wise to get it flushed, or will that cause damage?
    (how much does it cost to get a boiler flushed...?)

    I know it would be wiser to get a new boiler and new radiators... but that isn't in our immediate plans.

    p.s our radiators all have old clunky TRV valves which are all set to full. There is no thermostat in the house, just a dial under the boiler which is on full.
    Last edited by ST1991; 08-02-2018 at 5:27 PM. Reason: added more info
Page 1
    • MoaningMyrtle
    • By MoaningMyrtle 8th Feb 18, 5:33 PM
    • 1,932 Posts
    • 3,019 Thanks
    • #2
    • 8th Feb 18, 5:33 PM
    • #2
    • 8th Feb 18, 5:33 PM
    We had our old system
    powerflushed it cost 1200, the heating is great now.
    A minute at the till, a lifetime on the bill.

    Nothing tastes as good as being slim feels.

    one life, live it!
    • Gloomendoom
    • By Gloomendoom 8th Feb 18, 5:38 PM
    • 13,949 Posts
    • 18,358 Thanks
    • #3
    • 8th Feb 18, 5:38 PM
    • #3
    • 8th Feb 18, 5:38 PM
    I would be tempted to flush out the radiator that only gets warm first. That will not cost you anything if you do it yourself.

    Off topic, but why oh why cannot MSE cope with apostrophes on Apple devices any more?
    Last edited by Gloomendoom; 08-02-2018 at 5:40 PM.
    Never argue with stupid people, they will drag you down to their level and then beat you with experience. - Mark Twain
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