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airlock in hot water

Discussion in 'Plumbing and Central Heating' started by brenny, 22 Jan 2007.

This topic originated from the How to page called Installing a shower.

  1. brenny

    brenny

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    I have recently started the plumbing for a power shower in my own two story house. For the hot water inlet to the pump I drained the hot water cylinder and teed off a three quater inch copper hot water pipe for the downstairs taps and fitted an isolation valve before the pump. Is this method ok or should I consider a different approach, if so why?
    But ever since then I am getting airlocks in the hot water taps upstairs every two/three weeks. When I open the tap there is water spitting out and eventually no water will run. This lasts for a day or two and the problem \\\'fixes\\\' itself and the hot water flow is resumed only for the cycle to be repeated agin every two/three weeks. Is it possible to remove an airlock and if so how?? any advice is much appreciated.
     
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  3. Softus

    Softus

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    How did you tee off?

    Which pump is it?

    Did you follow the pump manufacturer's installation instructions to the letter?
     
  4. kevplumb

    kevplumb

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    no to the tee ;)
     
  5. Softus

    Softus

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    I am not worthy. :D
     
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  7. brenny

    brenny

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    Apologies, the pump is a Stuart Turner ST 55.
    The copper pipe from the top of the hot water cylinder was teed off, one side from the tank,one side for the hot water taps upstairs and one side for the hot water downstairs. I fitted the tee for the pump into the hot water pipe for the downstairs! I am not sure if this is the best method and if its not I can change the plumbing at this stage. I do not know if I should be fitting some type of flange to the top of the cylinder instead.
    Is the airlock a result of the work that I have done so far?
     
  8. Softus

    Softus

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    Dunno. It's really hard to work out the pipe layout from your words - can you post a photo, or a drawing, of what you've done?
     
  9. brenny

    brenny

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    Let me try and explain, for the hot water inlet to the Stuart Turner ST55 I teed of an existing 3/4" hot water pipe in the hot press. I then fitted a lever valve after the tee and before the pump so that I can isolate the feed to the pump if the event that the pump may have to be replaced. Is this ok or what method would you recommend when fitting the pump.
     
  10. Softus

    Softus

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    I'm interested in the height of the tee relative to the top of the cylinder, and whether air can enter the pipe leading to the pump - so far it hasn't been possible to determine these points from what you've written, hence it would be better to post a photo, or a drawing, of what you've done.
     
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