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Can I fit a shower pump on a Combi system?

Discussion in 'Plumbing and Central Heating' started by ottosump, 24 Apr 2018.

  1. ottosump

    ottosump

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    Hello group, just a quick question.

    Can I fit a pump to a thermostatic shower that runs from a Combi boiler.

    I have a Vokera Syseti 35 boiler, plumbing and electrics are easily accessible, would just like more oomph from the shower head.
    TIA Otto, in a damp West Cumbria

    IMG_3914.JPG
     
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  3. Dan Robinson

    Dan Robinson

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  4. ottosump

    ottosump

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    Is there a reason?
     
  5. Mottie

    Mottie

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    If he told you that, he’d have to kill you.
     
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  6. oldbuffer

    oldbuffer

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    1. It is against the Water Regulations to pump the cold main at more than 12 litres per minute.
    2. You might over-pressure your boiler.
    3. A combi won't heat more than its maximum specified flow of hot water at a given temperature rise no matter what you do.
    4. You could consider replacing that brass isolation valve (rhs of your picture, probably the hot) with a full bore one. Get rid of the PTFE on the threads at the same time.
     
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  7. Hot&Cold

    Hot&Cold

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    Your combi has a hot water flow rate of 12 lpm,iirc vokera do as a spare part a 13 lpm restrictor. That would give a little more flow but your shower mixer valve and shower head could also have a means of restriction.(either intended in design or due to being a Chinese import product).

    12 lpm from your combi matched with decent cold mains water flow and a decent mixer valve-shower head arrangement will give a decent invigoration shower as long its plumbed in correctly with no restrictive flow fittings. (y)
     
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  8. heatservice

    heatservice

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    Your electrics dont look too clever entwined with you plumbing as they are.
     
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  10. DH6

    DH6

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    That's the best shower fixing kit I've seen in my life!! :LOL:
     
  11. ottosump

    ottosump

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    I didn't fit the shower nor the electrics (they are what's left over from an electric shower I presume (they are dead)), I was only looking for advice.
     
  12. Bodd

    Bodd

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    You can have a shower pump that runs to a combi but not from a combi
     
  13. Dan Robinson

    Dan Robinson

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  14. Bodd

    Bodd

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    If he has a break tank he can.
     
  15. Dan Robinson

    Dan Robinson

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    Not likely though eh ;).
     
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  16. DIYnot Local

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