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3 way mixing valve

I have a taco 3 way mixing valve and was wondering if you must always pump away from one? or what happens if you pump into it.


  • Dave_4
    Dave_4 Member Posts: 1,405
    Pushing and Pulling

    This is about multi-port valves in general:

    When you pump away from a 3-way valve it will be a mixing valve (assuming the ports are set up correctly). You can picture that two entering streams combine then exit the common port which is open to the circulator suction side.

    When you pump into a 3-way valve, it will be a diverting valve. No mixing can take place (unless one of the diverting ports goes to a tee or other mixing chamber of course, but then the valve is not doing the mixing anyway).

    When pumping into a 3-way valve, the valve is essentially a traffic cop. Pump away, it's a matchmakah! Such a deal.
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