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Discuss Manually flushing radiator in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Loubanez

    Loubanez Member

    I have a cast iron radiator in my living room that I have noticed has been heating unevenly, (hot at top and cold at bottom), I am thinking that the radiator needs flushing?
    Although the radiator is extremely heavy so removing it will be a big task and i don't really want to remove the reducing bushes as it was a nightmare to fit them, ended up using boss white and hemp.
    Is it possible to flush the radiator leaving the radiator in place? There are two easily accessible T's which i can disconnect the pipework from can i apply a flow at one end and from the return run a hose to outside and just keep the radiator valves open?
    I hope that makes sense,
    Thanks
     
  2. Best

    Best Trusted Plumber

    Yes, you could flush that individual radiator from any flow and return and keep other rads off or other places where flow and return connect through, - like to a hot cylinder or a bypass valve or boiler.
    If it is an open vented system it would need the vent and feed pipes plugged temporary to allow you to put mains water through the radiator.
    Ideally you are best to drain the rad before flushing it to get full benefit of the power of the mains to clean the lower part or rad.
    Also consider using a cleaning chemical first and a magnetic filter fitted to return at oil or gas boiler
     
    • Like Like x 1
    • Agree Agree x 1
  3. Loubanez

    Loubanez Member

    Thanks
    I recently got a combi boiler fitted and the engineer fitted a magnetic filter, can you recommend a cleaning agent?
     
  4. Rob Foster

    Rob Foster Top Contributor!!

    What sort of system have u got
    and how old. zzThere are remedies but only when we know more about your system ok got that now, how clean is the filter ? what sort of boiler and its age.
    Rob Foster aka centralheatking
     
  5. Loubanez

    Loubanez Member

    The new combi was fitted on Saturday along with the filter, there are 5 rads it total, I plan to change them all within he next year apart from the casty which I want to keep.
    What else do you need to know?
    Cheers
     
  6. Loubanez

    Loubanez Member

    The existing rads I'm guessing are rather old as they are 3/4 connections
     
  7. Rob Foster

    Rob Foster Top Contributor!!

    ok, did your fitter flush the system out properly ? it seems not to me, and any remedy I will propose might invalidate the guarantee your fitter gave you ...even if the work was improperly completed , oh dear so why are you having to clean a supposedly flushed system
    no one can just fit a boiler and a mag filter take the money and walk away....wait to see what the others say. I was going to suggest using a strong mag and agitator on the naughty rad to lift the debris into the system but DONT do yet.
    . centralheatking
     
  8. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Yes why has your fitter not flushed the system? That’s likely your warranty gone
     
    • Agree Agree x 1
  9. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    I would call the fitter back and explain the problem.
     
  10. Stu-B

    Stu-B Member

    It’s standard on any new combi boiler install to clean and flush out the system. If your man has filled in the benchmark page in the back of the manual then he’ll have stated the system had been cleaned and flushed (with x800 maybe) and dosed with inhibitor.
     
  11. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Or no benchmark
     
  12. Stu-B

    Stu-B Member

    Surely not
     
    • Funny Funny x 1
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