Taco 5000 mixing valve help

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by b33p3r, Nov 16, 2010.

  1. b33p3r

    b33p3r New Member

    Messages:
    15
    Recently installed a taco 5000-2 mixing valve in a radiant loop. My issue is the hot water is going in the Hot Inlet and Out the Cold inlet. It is also leaving the mixed outlet to the radiant loop but alot of the water is bypassing the loops and going directly to the return manifold. The thermostat for this radiant loop never gets satisfied because of it.
    Is a check valve needed on the cold side to prevent this ? The valve is definately installed correctly with regards to hot/cold/mix.
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