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Discuss Accumulator expense woes in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Gasmart1

    Gasmart1 New Member

    Hello to all. I have a very insistent customer who was keen to have an accumulator/pump installed and at the final hurdle done a complete u turn and opted to put a cwsc (ground level!!!) with a Stuart turner negative head single impeller pump to feed a megaflo and cold to the bathrooms.

    I advised against this!

    Guess what? It only doesn’t work!

    Is anyone aware of a pump that would perform any better or do we all agree that an accumulator set up is the only way forward?

    I would appreciate all professional opinions.

    Let the debate begin...
  2. Craig Watson

    Craig Watson Plumber GSR

  3. Chuck

    Chuck Well-Known Member

    If your first attempt didn't work, I think you should contact Heatrae-Sadia and ask for their recommendations, e.g.:

    Technical advice

    Personally, other things being equal, I prefer accumulators over pumps just because they're simple and have less to go wrong; both qualities I like more and more the older I get.
    Last edited: Feb 7, 2019
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Why what happens in theory it should work

    Now if it’s a demand problem fair enough
  5. Gasmart1

    Gasmart1 New Member

    Thanks for the advice. I’m a one man band and yes the fag packet has definitely been utilised on this one!
    The customer in question used to have a building firm and is full of it from time to time.
    Greatwater was the original suggestion
    as an accumulator/pump to be installed
    but the customer seems to think that set up a bit too expensive.
    They are back on mains for now but asking could a bigger pump do more?

    I always cover myself with my professional guarantee...

  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Dab easysys
  7. Gasmart1

    Gasmart1 New Member

    Thanks Craig. They’ll probably opt for that being “sneezed” in next!
  8. Gasmart1

    Gasmart1 New Member

    And the dab looks good.
    Has anyone installed?
  9. Craig Watson

    Craig Watson Plumber GSR

    No probs, I haven't installed one myself but I had quoted to fit one as a replacement for an earlier model, after speaking with grundfos these pumps are about as good as it gets. I would however speak to grundfos about the proposed system. Pressuring a megaflow might be too much strain on the pump motor.
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I have

    What’s wrong with the existing pump ?
  11. Gasmart1

    Gasmart1 New Member

    Oops I got it wrong! Pump is positive!

    Set up is as follows.

    Two 227l cwsc on ground level feeding
    a 3.0 bar positive head single impeller
    Stuart turner pump. Which then feeds
    A 300l Megaflo which was pre filled direct from mains and works fine.
    The cold however does not flow to engage the pump!
    System reverted to mains and works fine at 2.0 bar working pressure but customer has a lot of outlets to feed. There is no loft space for tanks hence floor level.

    Top floor: bathroom
    1st floor: two bathrooms
    Ground level: two en-suites 3 kitchen areas 1 utility two 5 berth caravans and . erm?. a dog shower!:)

  12. deg

    deg Member

    I’m not smart enough to offer advice on this one but are your cwst high enough? Usually need about 600mm above your pump to offer “positive head”
    I take it the water supply comes from a well or spring?
  13. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    That’s why wrong pump :) needs to be neg or a whole house booster

    Who got the pump ?
    • Agree Agree x 4
  14. Craig Watson

    Craig Watson Plumber GSR

    So you installed a positive head pump with the tanks at ground floor level and expected it to work with the bathroom 2 floors above? :confused:. Are you sure your qualified/experienced enough to do an installation like this?
    • Agree Agree x 2
    • Useful Useful x 1
  15. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Did you protect the mains from the dog shower as it’s cat 5 risk ?
    • Agree Agree x 1
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