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Discuss NO I AM NOT AN UNDERFLOOR HEATING EXPERT! in the Underfloor Heating Forum area at UKPlumbersForums.co.uk.

  1. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Is it all the rads or just some ?
     
  2. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Just some mate.
     
  3. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    When the underfloor comes on does the flow or return get hot first
     
  4. Chalked

    Chalked Plumber GSR

    I would bet the underfloor return is teed into the heating return. Then teed into the main return.
    I should have a dedicated flow and return from the mains.
    And so should all other zones too
     
    • Agree Agree x 1
  5. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Need to go back and check as it was late and left the owner to test. But have fitted non return on all returns as the are all exposed in the loft. So doubt it is the returns getting hot.
     
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Unless the rads are on the manifold it's got to be coming through the return
     
  7. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    That's is exactly what I am thinking. But I cannot see where. I will go back and check however all three returns are all on the pipework back to the boiler in the loft next to the cylinder
     
  8. Stigster

    Stigster Plumber

    That was for Matchless because he asked how reverse circulation works so I just put up a quick post to the diagram. I hope you find what's going on with your problem, it's a bit baffling for sure.
     
    • Like Like x 2
  9. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    No worries my post sounded harsh but was not meant in that was either
     
  10. GH77

    GH77 GSR Top Contributor!!

    Do you have access to Thermal imaging? . I've got a FLIR that plugs into the bottom of my phone, use it on UFH all the time, will show you where and how the heat is moving around, if you let the system all go cold then return the next day hopefully that will shed some light on the problem
     
  11. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    No, but I may have to invest in a camera? There another expense?:(
     
  12. GH77

    GH77 GSR Top Contributor!!

    Around £200, but very useful especially with UFH
     
  13. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    I'll have a look into them
     
  14. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    flir one
     
  15. Matchless.plumb

    Matchless.plumb Trusted Plumber GSR

    What model of flir have your got if you don't mind me asking
     
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