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Discuss CWST back filling up cold feed in the Plumbing Forum area at UKPlumbersForums.co.uk.

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  1. Frazer1981

    Frazer1981 New Member

    Hi

    Just looking for some advice.

    Have an indirect cylinder, open vent htg and hw.

    When the customer turns the heating on the small header tank starts trying to fill and the cold water storage tank starts to back fill up the cold feed. How water is also really hot coming out the hot taps. My gut feeling is this could be an issue with the cylinder coil but just wondering if anyome has advice!

    Any help much appreciated
     
  2. Riley

    Riley Plumber GSR Top Contributor!!

    Sounds like a split coil. Which loft tank is higher
     
    • Agree Agree x 1
  3. Frazer1981

    Frazer1981 New Member

    Both sitting on the joists but the CWS is higher and a bigger tank
     
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