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Zone valves better on return?

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JimX
JimX Member Posts: 12
in Radiant Heating
Are zone valves better on the return than on the supply?

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  • JStar
    JStar Member Posts: 2,752
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    I've found.

    No significant difference on any jobs I've done, although I like to keep zone valves on the suction side of the pump to reduce noise on closing. And if you pump on the supply, they'll always be on the return.
  • JimX
    JimX Member Posts: 12
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    suction side

    Thank you, I think I will put my new setup that way.

    Jim
  • heatboy
    heatboy Member Posts: 1,468
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    I prefer the supply side.....

    ...... if for no other reason than to assure there is no migration flow in the "off" zones.  If I were to put them on the return side, I would either use thermal traps or checks on each supply. 

    There was an error rendering this rich post.

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