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Reverse circulation

Discussion in 'Plumbing and Central Heating' started by Stuzzy77, 13 Sep 2016.

  1. Stuzzy77

    Stuzzy77

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    Hi,
    I've got a y plan system which was working fine until the pump failed. I drained the system which was sludgy and replaced the pump. The radiators are now heating up on a hot water demand even after replacing the 3 port to try and cure it.
    Considering reverse circulation wasn't a problem until the pump failed can a partial blockage
    cause this issue. The f&e pipes tee in before the pump ok and there's no pipes after the cylinder return.
    Ani ideas?
     
  2. sounds like you just need to keep googling your problem till you get it right. because you dont have a clue at what reverse circulation really is. google it
     
  3. Razor900

    Razor900

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    Which way is the arrow pointing on the pump. Towards the 3 port or away?
     
  4. Stuzzy77

    Stuzzy77

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    Arrow on pump pointing towards 3 port and the diverter valve A heating and B hot water:
     
  5. hertsboilers

    hertsboilers

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  6. hertsboilers

    hertsboilers

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    More likely a let by the middle position valve.
     
  7. PullerGas

    PullerGas

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    The HW cylinder return should be the first tee on the common return to the boiler.
     
  8. Lastmuffininbrussels

    Lastmuffininbrussels

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    +1
     
  9. AGAS

    AGAS

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    did you change just the head or whole valve ?
     
  10. DIYnot Local

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