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  1. J

    Reconnecting my G/F Radiators using an UFH Manifold

    Won't go into the reasons and much is personal preference but after a full basement dig out which meant all my G/F radiator pipework had to be ripped out, I have decided to reconnect them using an UFH manifold, with one loop for each room. Had enough Pex-Al HDPE pipe for 2 rooms but have one...
  2. J

    Grundfos UPM3 Flex AS - Cant change settings

    I installed this as part of an UFH Manifold circulator. Can press the button to change the speed between three speeds. But I see now that I can change the way it works and it should be in Constant Pressure mode for UFH and it isn't. After reading the manuals, it says to press the button for 2s...
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