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  1. H

    Return flow pipe blockage

    The following is my situation and would appreciate any advice. My boiler is a 22 year old closed circuit worcester. Boiler parts have been replaced over a number of years so I think the fernox must be well diluted. The original piping is copper micro bore and 2 radiators are grey plastic...
  2. H

    Central heating closed circuit.

    Hi Is it possible to replace the inlet valve on a single radiator by closing all the other radiator inlet and outlet valves and drain feed to this radiator only without draining the whole system. Thanks in advance for any replies.
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