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leaking Boema-single group head

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  • leaking Boema-single group head

    Hello all.
    I am new to this forum and based on a review of some of the comments I am sure someone will be able to help me.

    I have an old Boema single group head machine (P/n 011463) no idea how old, but it has had a lot of use.

    It recently started leaking from the anti vacuum valve and the safety valve, I replaced these valves today only to find that the inlet water will not shut off and keeps filling the boiler to the point that the safety valve lets go at 80 psi. I can not find the water shut off device to test.
    Any idea as to what is happening please? Diagrams or schematics might help.

    The only way to stop the safety valve from popping is to turn of the water at the mains tap.

    Please note that I have not even turn the machine on yet.