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  1. S

    Two Questions!

    Evening All I don't work on gas or oil, I live a simple life repairing showers :-) so I have a couple of questions:- 1. My nephew has a gas leak on a mild steel pipe buried in a wall. He wants the pipe from meter to boiler renewed as a repair would be difficult. He has a 'mate' who is a gas...
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    Expansion Vessel Size

    Hi I have a Grant 26-36 S Pro boiler fitted with underfloor heating and DHW. The system was fitted about 3 years ago (not by me) and has worked well since then, only issue is topping the system up every now and then. Pressure has never fallen sufficiently to stop the system working I have just...
  3. S

    Cold water from hot water tap

    Ok back to basics. Are you able to identify the hot water pipe at the boiler? Can you let us know if this runs hot when you get cool water from a tap?
  4. S

    Cold water from hot water tap

    That is not a shower I know and being a concealed valve makes it a bit more tricky. Does the shower work ok? Is the temperature of the shower ok? If yes then we could be on the right track. If no then the showewr is probably not the culprit. If you have access to the shower pipes, within an...
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    Cold water from hot water tap

    Water will take the easiest route so if you have shower then basin then bath then boiler the water getting past the NRV can flow to the basin tap while the water flowing through the boiler can go to the bath tap. If you post a picture of the shower or let me know what make and model it is I amy...
  6. S

    Cold water from hot water tap

    Possibly debris in hot water NRV (non return valve) of shower mixer? This could allow cold water to mix with the hot water.
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