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Discuss Y plan question on blockage in the Central Heating Forum area at

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  1. howy1

    howy1 Member

    hi all, just a cauriosity question , why is it on y plans the feed and vent close coupled section blocks ! just a friend has blockage cleared in this area and asked question.
  2. KingDoey

    KingDoey Plumber GSR

    Because that's generally where the crap from the feed and expansion cistern gets stuck as it is drawn down.
    • Like Like x 1
  3. JamesG92

    JamesG92 GSR

    Most of the time its only 15mm too so can block easily on a dirty system.
    • Like Like x 1
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