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Low cold water pressure in bathrooms only

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  • 23-07-2019 10:51pm
    #1
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,549 Mod ✭✭✭✭


    Info

    3 story house (attic converted)
    No toilets or taps in attic but I did put in a new tank and adjust plumbing during renovations. House originally built in 1996.

    Kitchen tap is perfect (mains fed)
    Bathroom and en-suite cold taps are very low. The bathroom is a trickle and the en-suite is manageable but noticeably low pressure.

    Gravity fed system, no pumps etc

    Where do I start?
    Plumber out job?


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    #2
    Sleeper12
    Registered Users Posts: 16,919 ✭✭✭✭Sleeper12


    Is it just the cold in the taps? Hot water pressure is fine everywhere?


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    #3
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,549 Mod ✭✭✭✭Gumbo


    Sleeper12 wrote: »
    Is it just the cold in the taps? Hot water pressure is fine everywhere?

    Yes, hot water is fine.
    Mains cold is fine and the WC at ground floor level is fine as gravity obviously helping that!


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    #4
    rameire
    Registered Users Posts: 4,129 ✭✭✭rameire


    could dirt or sludge have moved down the pipes and be blocking some areas so reducing the pressure?

    🌞 3.8kwp, 🌞 Split 2.28S, 1.52E. 🌞 Clonee, Dub.🌞



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    #5
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,549 Mod ✭✭✭✭Gumbo


    rameire wrote: »
    could dirt or sludge have moved down the pipes and be blocking some areas so reducing the pressure?

    Possible.
    It was a tank out renovation. New tank in and a bit of re-routing of some pipes within the existing plumbing.

    The taps are these - https://nikobathrooms.ie/product/venice-basin-mixer-4/


    Some mentioned that its possible the taps are for a pumped system and are not getting an adequate supply to give the impression of pressure?


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    #6
    Sleeper12
    Registered Users Posts: 16,919 ✭✭✭✭Sleeper12


    kceire wrote:
    Some mentioned that its possible the taps are for a pumped system and are not getting an adequate supply to give the impression of pressure?


    This would be likely if hot and cold were bad. Only cold problem suggests issue with isolation valve or the cold water fee from the tank.

    Valve not open fully. Airlock in the cold supply of debris in the cold water supply


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    #7
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,549 Mod ✭✭✭✭Gumbo


    Sleeper12 wrote: »
    This would be likely if hot and cold were bad. Only cold problem suggests issue with isolation valve or the cold water fee from the tank.

    Valve not open fully. Airlock in the cold supply of debris in the cold water supply

    I’ll check the valve later when home.
    Any tips on how to remedy if one of the other 2?


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    #8
    Sleeper12
    Registered Users Posts: 16,919 ✭✭✭✭Sleeper12


    kceire wrote:
    I’ll check the valve later when home. Any tips on how to remedy if one of the other 2?


    I'd get back whoever did the original work & let them worry about it if that possible.

    Airlock could be bad pipework with a high point trapping air. Usually with an airlock if you go to the bath mixer, put your hand over the spout stopping any water getting out & turn on both hot and cold. With luck the pressure from the hot will force the air up into the tank from the cold pipe. Some people use a garden hose with mains pressure to force the air out of the cold supply.


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    #9
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,549 Mod ✭✭✭✭Gumbo


    Cheers. Yeah it’s my cousin that done the plumbing. He’s getting married next week so didn’t want to bother him so close.

    If I can’t sort it myself I’ll get him back afterwards.

    Cheers for the tips.


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