Potterton Promax HE Store -should I keep it on all the time?

Discussion in 'Plumbing and Central Heating' started by superye, 29 Sep 2012.

  1. superye

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    Hi all,

    My house has Potterton Promax HE Store - I normally let it heat up hot water only and then turn it off, unless I need central heating. The problem (may be not a problem) is every time when I need hot water I will have let the tap run a while and then hot water comes out, if I turn the tap off for just one or 2 seconds, I will have to wait a while before hot water comes out. I am wondering if that's normal. i think it's wasting of water because my house have a water meter. Can you please share your experience if you are having Potterton Promax HE Store as well? Thanks
     
  2. Armo74

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    The length of pipe runs, insulation, and other factors can dictate the time taken for hot water to reach your taps.
     
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  3. superye

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    Thanks for your reply Armo. I understand I need to wait for the hot water to reach the taps from the floor standing boiler (thru the pipe work), but my experience is no matter for how soon i switch off the tap, it seems I need to wait for freash hot water to reach to the taps again. My understanding is that hot water is already in the pipe work (provided I only switch off the taps for 2 seconds), I shouldn't be waiting for that long like the 1st time.

    Thanks
     
  4. superye

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    Anyone has the experience or knowledge please? Thanks
     
  5. Armo74

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    Does this happen on all of your taps? Has it always happened?
     
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  6. superye

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    Sorry for a long long dealy, yes, it's the case for all taps. thanks
     
  7. Joe4542

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    As you say, once you've flushed the cold water out of the pipe, the hot water in there would stay warm for minutes, if it's cold straight away, then you have a problem.

    It's not going to be anything with the boiler, possibly you've got a thermostatic mixer (shower or bath) that's letting by cold onto the hot side? Cold having easier path than hot and so back-feeding up pipes.

    If you have service valves feeding said thermostat mixer, turning them off would confirm/disprove theory.
     

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