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Discuss Problems with my Plumbing - Fog horn noise in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Acorn

    Acorn New Member

    Hey all,

    I’m having a problem with the plumbing in my flat. Last night when I turned the hot tap on in the bathroom it started making a noise like a fog horn. I have a single tap for the hot and cold water.

    It’s never done it before. I also tried the hot tap in the kitchen (which is a mixer tap) and when turned to hot only it also made the fog horn noise. Only the hot tap is making the fog horn noise.

    I have also noticed that the cold tap when running is making a rushing noise and so is the toilet when it is filling. The water is also coming through very forceful.

    Any ideas what is going on? My plumbing skills are zero so I don’t have the first clue on how to fix it.

    I live in a flat which is on the fifth floor. The fifth is also the top floor. I don’t have central heating so no radiator’s are installed.

    My landlord once told me that he attached the cold water supply direct to the mains so as to get high pressure for the flat being on the fifth floor??? There is no pump fitted and the pressure of the water is high as you can run a shower with no problems.

    In the cupboard there is a water heater that looks like an immersion heater and another round tank which I think is a expansion tank.

    It’s all very old and my landlord once said the expansion tank was no longer used, though it is still connected to the pipe work.

    Could it be an air lock or something more. Can it be something I can fix myself?
  2. Craig Watson

    Craig Watson Plumber GSR

    Sounds like you need to service the float valve in the tank which is above your cylinder. Or replace it.
    • Like Like x 1
    • Agree Agree x 1
  3. Acorn

    Acorn New Member

    Where would that be located? Is it inside the expansion tank?
  4. CBW1982

    CBW1982 Plumber GSR Top Contributor!!

    Take a photo if you can of water heater in cupboard. We can guide you from there. It will probably be in the expansion tank (cold water storage cistern) if that's what it is, it might be a combination tank as well
  5. Acorn

    Acorn New Member

    Here is pictures of all that's inside my cupboard. 6.jpg 5.jpg 3.jpg 1.jpg
  6. CBW1982

    CBW1982 Plumber GSR Top Contributor!!

    Ok so the expansion tank is actually a vessel, and that looks like an unvented hot water cylinder, so will not have a float valve. Are your taps 1/4 turn? Do you have a float valve in any wc cistern that could be coincidence of running hot tap? Does it make the noise every time you use the hot tap?
  7. Acorn

    Acorn New Member

    The bathroom taps are 1/4 turn. The kitchen taps are a mixer tap.

    Its definitely not coming from the WC Cistern. My landlord changed it a couple of years ago to a push flush. So no old style float valve.

    The noise is only coming from the hot taps when turned on. So far every time I have tried them in the bathroom and kitchen.

    As for the cold taps and WC Cistern the water is coming through very forceful. It makes a rushing noise when running / filling its so fierce.
  8. CBW1982

    CBW1982 Plumber GSR Top Contributor!!

    Try running the kitchen hot tap, and go to the bathroom hot taps and see if any drip or run water slightly, if they do then that should be the problem, and new tap insert should be sought.
  9. Acorn

    Acorn New Member

    OK will have to try at a more reasonable hour as my neighbours will think they are on a cruse ship otherwise lol.

    One other thing I noticed is when I try to turn on either the hot tap in the bathroom or the hot tap in the kitchen it feels like the pipes are vibrating really badly when the sound starts. You can feel it as the walls are only plaster board.

    Would a faulty tap insert also account for the cold water coming through so forcefully all of a sudden?
  10. Acorn

    Acorn New Member

    Doing a bit more research and I don't think the taps are 1/4 turn after all. They look similar to these on the Sink

  11. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Well do they only turn a quarter of a turn or do they unwind more. That pic shows us nothing as the guts of the tap could be either. My suspicion is that you have a fault on your unvented cylinder. For this though you will require a G3 qualified engineer
    • Like Like x 1
  12. Acorn

    Acorn New Member

    They turn all the way. As I said my knowledge of plumbing is poor. I turn a tap on and water comes out is all I know lol.

    The thing I don't understand is why this suddenly happened. I used the hot water tap at 11.30pm and there was no noise. An hour later I used the same tap and the noise started out of the blue.

    There has been no build up to this event or warning its been fine for the past 9 years.

    Could it be an airlock as they were digging up the road next to my flat yesterday.
  13. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    100% will not be an airlock if you are getting water at taps not sure why you’d think it was. Could be that your water pressure has improved and a problem that wasn’t apparent now is.
    • Agree Agree x 1
  14. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    I have not read all comments ..

    First step .
    Your landlord needs to get a G3 plumber to service the cylinder, he should do this every year .
    • Agree Agree x 5
  15. Acorn

    Acorn New Member

    I was not aware of this. We have lived here for 9 years and it has never been serviced.
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