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Discuss Gas fitter masquerading as a plumber. in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. ShaunM81

    ShaunM81 New Member

    Gas fitter here needing some experienced plumbers advice.

    A family member has had a new kitchen + bathroom fitted. The hot water coming from her gravity tank has a very poor flow rate now at all her taps, as does the cold mains, strangely. After checking the usual suspects - stopcock, water in tank etc I then attached a water pressure gauge to the cold mains pipe going to the kitchen sink and was getting 1.5 bar. Hot water was around 0.1 bar which is pretty normal I believe for each. Yet very poor flow rate coming thru the actual taps. I done the same checks in the bathroom sink + bath and same outcome. Toilet is filling fine and electric shower pressure is fine.

    Is this due to the “wrong” kind of taps fitted? The old taps were all individual full turn types. Now theyre all mixer tap 1/4 turns. The ones in the bathroom are the waterfall type. Could these new tap choices be designed for a different pressure or could the 1-4 turn type be wrong in some way?

    Any advice appreciated cheers.
  2. Gasmk1

    Gasmk1 GSR

    are they fitted on flex connections some of these are quite flow restrictiong also are there isolations valves if these are not full bore they also restrict flow
  3. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    You are correct you can get low pressure taps. But as above check for kinks in flexi pipes
  4. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Waterfall style are notorious for low flow
    • Agree Agree x 1
  5. ShaunM81

    ShaunM81 New Member

    Yes onto flexi’s mate and have isolation valves, however the pressure after the isolation valve on the mains side is 1.5 bar, so I don’t think the iso valves are the issue, the pressure after each iso valve is fine as id disconnected and checked, so the only possible things are the flexi hoses and the taps themselves, the water is dramatically reduced coming out each tap for hot and cold, could it be a mixture of flexis and incorrect taps?
  6. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    Possibly mate. What make and model of tap is it?
  7. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Do we know where they were purchased from also
  8. Pickwickpick

    Pickwickpick Plumber

    I think its more likely that the taps are the main issue although flexis & iso are probably contributing. Could you try scrapping the flexi and iso valve (or swap it for full bore) on one of the taps? Also have they still got the original taps to hand? If so you could swap one of the new taps for an original one, connecting it to the flexi. This would be a fairly cheap and quick way to rule things out.
  9. ShaunM81

    ShaunM81 New Member

    Can’t see what brand the taps are unfortunately, and I don’t have the old taps

    So when you say full bore taps, do you mean taps with 15mm straight into them?
  10. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Ask them where they bought them they could be off eBay. They could be some tat from vp
  11. rpm

    rpm Trusted Plumber Top Contributor!!

    PTFE tape where flexi joins tap is half blocking the outlet in the flexi?
    Have seen it.
  12. ShaunM81

    ShaunM81 New Member

    No ptfe or anything else present, 90% sure now it’s flexis and incorrect taps... for future reference do you guys match certain taps to specific water pressures? As in gravity water = low pressure compatible taps?
    • Like Like x 1
  13. JCplumb

    JCplumb Plumber

    The waterfall tap I have on my bath has pre-fitted flow restrictors, I didn't take them out before fitting and I now regret it as the flow is awful.
    One day I'll get the time to take the panel off and remove the buggers.
    Maybe your waterfall tap has these too?
  14. ShaunM81

    ShaunM81 New Member

    I think you are spot on mate I will check for these too!
  15. Craig Watson

    Craig Watson Plumber GSR

    Have you checked the filters on the outlet? Kitchen mixer will probably have a high pressure filter on its outlet which clogs up easy and some of the waterfall taps I've came across have a mesh filter in the outlet too.

    Could also be the tap isn't designed for low pressure systems, if you know the tap make and model, check the min specs online
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