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

Overflowing F & E

Discussion in 'Plumbing and Central Heating' started by Alex0r, 19 Feb 2009.

  1. Alex0r

    Alex0r

    Joined:
    19 Feb 2009
    Messages:
    17
    Thanks Received:
    0
    Location:
    Devon
    Country:
    United Kingdom
    Hello all,

    I recently got called out to a friends house who had hot water spewing out of the vent pipe above the cold water storage cistern (cwsc). This is turn caused several holes in the cwsc, resulting in a downpour of water.

    Anyway I put this down to a faulty immersion (think the old ones didn't have a safety cutout on the thermostat?).

    Replaced the cwsc, replaced the immersion.

    All seemed fine.

    Until this evening. There's water spewing out of the vent pipe to the F and E tank. Nothing coming out of the cold feed, but noticed the cwsc trickling water down to the cylinder below. A quick check of the house indicated no hot water demand at the taps / washing machine etc. Also the water only overflows when the CH is on.

    In the meantime I've turned down the temperature of the boiler in case it's simply getting too hot.

    All suggestions welcome!!

    Cheers :)
     
  2. davebgas

    davebgas

    Joined:
    9 Feb 2009
    Messages:
    2,043
    Thanks Received:
    256
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    pumping over?, knackered boiler stat? pump set too high? blockage.... etc etc etc
     
  3. Alex0r

    Alex0r

    Joined:
    19 Feb 2009
    Messages:
    17
    Thanks Received:
    0
    Location:
    Devon
    Country:
    United Kingdom
    Thanks Dave, what's my best course of action to determine the exact cause. I'm not going to touch the boiler if it's anything to do with that or zone valves etc.

    Think I might leave this one to a CORGI engineer...
     
  4. davebgas

    davebgas

    Joined:
    9 Feb 2009
    Messages:
    2,043
    Thanks Received:
    256
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    Dont mean to sound patronising but you did plumb the cwsc in correctly?
    How long is the boiler on for before water starts coming out the vent? Its is steaming water or just a continuing run of water?
    What speed is the pump on? Try turning it down.....
     
  5. Alex0r

    Alex0r

    Joined:
    19 Feb 2009
    Messages:
    17
    Thanks Received:
    0
    Location:
    Devon
    Country:
    United Kingdom
    Yeh I'm confident the CWSC is plumbed correctly :) 22mm cylinder feed at bottom, cold mains feed at top, overflow at top, cylinder vent above? :)

    FWIW, the cold feed for the F and E Ts off the feed for the CWSC, not that I think that's relevant.

    The water sort of gently spews from the F and E overflow, and starts then stops. Wondering why theres water being drawn from the CWSC tho, when theres no call for hot water anywhere (all cold taps are mains fed). Was thinking maybe a cracked coil in the cylinder, but then surely the F and E would be constantly overflowing, not just when the CH is on?

    Cheers
     
  6. davebgas

    davebgas

    Joined:
    9 Feb 2009
    Messages:
    2,043
    Thanks Received:
    256
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    Coil could be cracked....
    The ball valves in the F&E and CWSC would shut the supply off when they are both full...
    stick the pump on and you could cause a movement in water which would mean the level in the cisterns drop and hence keeps filling.

    I'd get someone in to look as its difficult to try and diagnose anything without having a butchers..
     
  7. Alex0r

    Alex0r

    Joined:
    19 Feb 2009
    Messages:
    17
    Thanks Received:
    0
    Location:
    Devon
    Country:
    United Kingdom
    Fair dos! outside my remit this one i think.

    Cheers :)
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    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

     
  9. Sponsored Links
Loading...

Share This Page