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Hot water very slow after Rad flush

Discussion in 'Plumbing and Central Heating' started by zanwan, 5 Oct 2011.

  1. zanwan

    zanwan

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    Hi all

    I flushed out the rads the other day on mates system and he says since then the hot water is running at a very slow rate.

    I turned off the boiler when i drained down the system. Turned it back on. There was no water from the hot water taps for a few seconds, but then it appeared to run fine.

    But now he says the hot water flow rate is very low. Does anyone know what may have caused this? Its a combi boiler he has.
     
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  3. Agile

    Agile

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    Golden Rules:-

    1. Never do jobs for mates!

    2. Never do jobs unless you are completely competent to not only do the job but ALSO to deal witrh any resulting problems.

    Have you actually MEASURED the hot water flow rate and compared it with the boiler spec?

    Or measured the cold supply dynamic flow rate?

    Tony
     
  4. zanwan

    zanwan

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    no, not done any measuring. But the water flow is very slow compared to the cold water tap.

    I dont understand how turning off the boiler could have caused this issue. I didnt touch the hot water pipes.

    Only thing i can assuem is its an air lock, but then surely that would stop all hot water flowing?

    Boiler is an Ariston euro combi
     
  5. Agile

    Agile

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    You would not NEED to turn off the cold supply to the boiler but you probably did.

    That may not be fully on again.

    You may have released debris which is now blocking the DHW path in the boiler.

    Tony
     
  6. spraggo

    spraggo

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    What is the make and model No of the boiler?.
     
  7. zanwan

    zanwan

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    its an Ariston Euro Combi
     
  8. dcawkwell

    dcawkwell

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    These boilers have a domestic water inlet filter according to
    the manual.
    That is the place I would start.
     
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