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    Smudgertron79's Avatar
    Smudgertron79 Posts: 1, Reputation: 1
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    #1

    Oct 6, 2009, 10:12 AM
    Bathroom hot water comes on then a goes off after 5 seconds and I hear a knocking
    I hope that somebody can help, I live in the West Midladns, UK and have an issue with loss of pressure from my hot tap in the bathroom.

    I turn the tap on and hot water comes out then after about 5 seconds it goes off and I hear a knocking sound and you can feel on the sink a slight vibration. If I turn the tap open a bit more i.e. 2 turns hot water will come out then.

    We have a combi boiler system.

    Can anybody help with this please?
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Oct 6, 2009, 11:54 AM

    Sounds like a loose washer in the hot tap. Could be something in boiler mixing valve but try this first. Turn off water , remove handle and stem of hot tap and tighten the washer screw.
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