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Author Topic: Underfloor Heating - Negative view  (Read 5678 times)
andrewellis
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« Reply #30 on: December 28, 2019, 10:44:01 AM »

As I found out a potential problem with these manifolds with integral pumps is that they suck up all the available flow. Thus with both my old LPG condensing boiler and, until we changed it, the GSHP, every time the solenoids opened for the kitchen UFH the flow to the rest of the house ceased (and that was with the integral pump on its minimum setting).

Hi Richard

Merry Christmas, hope you are well.  I was just about to do this same thing in my living room.  What did you end up changing to to stop the pump taking all the flow?  Did you put a restrictor in line or install a less powerful pump?
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