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  1. K

    Pipework sizing.

    Are there any good web sites that can help me check the size that my boiler primary main should be, as I am unsure that the plumber has installed a large enough bore pipe. System:- Sealed Unvented system Baxi 100HE condensing boiler (gas) Santon premier plus 210L tank Polypipe...
  2. K

    tapping sound from boiler

    Immediatly after the boiler switches on the sharp tapping sound starts. It seems to be located in the pipe which runs from the boiler to the pump. Can anyone help me solve this problem?
  3. K

    TRV's wrong way round!

    I've just found out that some of the TRV's are on the return side of the radiators and some are on the flow side! Is this a problem?
  4. K

    How do I drain hotwater tank in an unvented system?

    I need to change a faulty thermostatic shower valve, and surprise surprise there are no inline isolating valves on it! How do I drain the hot water side of the system so I can change this part? I presume the cold water can be isolated just by turning the stop cock off? :oops:
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