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Plumbing help: How to replace a circulation pump?

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  • deano72_2
    deano72_2 Posts: 786 Forumite
    yep sounds like that all you have to,,but not totaly sure you might have to partly drain down the heating system aswell depending how its plumbed,if u got a little header tank in the loft that supplies the boiler that needs to isolated.best bet is just to isolate the pump either side,will be lot easier...
  • latecomer
    latecomer Posts: 4,331 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    No I dont agree. The hot water supply that goes to your tap is not the same as the one that the pump is on. They are physically separate and by draining the hot water tank you will still get wet when you undo the pump.
  • latecomer
    latecomer Posts: 4,331 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    Check out the how to drain a central heating system on this page:

    http://www.letsfixit.co.uk/html/plumbing_faq.html
  • teepoo
    teepoo Posts: 158 Forumite
    Part of the Furniture 10 Posts Combo Breaker
    Thank you all for your help.

    I was able to fix my circulation pump problems.
    I found that the root cause was that the pump had overheated and short circuited because I had shut off one of the stop valves. This then caused the 3amp fuse in the spur to break - thus cutting off power to the programmer.

    Since the other stop valve did not work, I had to drain the hot water cylinder plus central heating and then replace the circulation pump.

    I have re-filled the system and avoided any air-locks.

    Thank you again,
    Pete.
  • latecomer
    latecomer Posts: 4,331 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    when you refilled the central heating did you add an inhibitor? If not then you should drain a little out and add some as its important to prevent corrosion within the system. Ferenox and Sentinel both do them (and they seem to be widely used in the trade).
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