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circulator location

Todd_17 Member Posts: 31
what is the best location for a pump that controls 1 zone of in floor heat that has 4 loops of 1/2" tube fed by a 3/4" copper from the boiler that is about 40' of piping away? Nearest the manifold or the boiler or does it matter?


  • Dave_4
    Dave_4 Member Posts: 1,405
    If the mixing point

    for the zone is at the manifold, the circulator wants to be downstream of that.

    That said, there is no harm keeping it in the boiler room if you want, so long as your line losses (both temperature and pressure) can be dealt with.

    Personally, I like to keep my PEX runs short so would run copper or large PEX-AL-PEX to my circulator close to the floors it will be serving.

    Of course your circulator will be downstream of the expansion tank and should pump INTO the tubing. Too restrictive especially if a high-head pump and it could cavitate.
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