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Not getting flow

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vspa5007
vspa5007 Member Posts: 4
in Radiant Heating
I am using a Taco 007-F5 with a heat exchanger to a single zone in 1/2" pex. The set up is in the basement and the floor to be heated is two floors up. The water must rise approximately 13'. The flow is around .5gpm. Could it be that the pump is to small? Have I miss calculated my head rise? I have the Extrol expansion tank pressurized to 12psi.

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  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
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    possibly...

    How long is your 1/2 pex loop?  So we can figure out flow and head. If the loop isnt too long, could be air.  You're sure the pump is working?  Also, got a pic or a sketch?

    There was an error rendering this rich post.

  • vspa5007
    vspa5007 Member Posts: 4
    edited December 2011
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    No flow response

    Thanks for the response. The loop is about 200'. I have attached a picture. It sounds like the pump is running.
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