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New build radiant infloor 3 out of 5 loops not getting flow

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Snowman56
Snowman56 Member Posts: 6
in Radiant Heating

The system i piped today on a new house when bleeding out the infloor loops I could only get flow out of 2 loops the other 3 had no flow. I removed the pexs from the manifold to check if the manifolds valves were opening that was fine I then tried to blow air through the loops to see if they got crossed and got nothing through on any of them I suspect the got cut during the construction process and possibly blocked by concrete. Is there any way to confirm this or figure out where it might be in the floor so the floor can be removed and a repair done?

Comments

  • hot_rod
    hot_rod Member Posts: 26,546

    Cut, or kinked is more likely.

    You removed all the ends that did not flow, checked them with air pressure?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Snowman56
    Snowman56 Member Posts: 6

    Yes I removed the ones with no flow and tried pushing air through and got no flow that way either it just pushed back at me

  • hot_rod
    hot_rod Member Posts: 26,546

    frozen?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    rick in Alaska
  • hot_rod
    hot_rod Member Posts: 26,546

    with power off you screw the brass ring until the dot lines up with the arrow

    when powered up, thermostat calling, indicator goes to “valve open” position

    Instructions are printed on cover

    The one on the tight is certainly done

    Uponor has an upgrade actuator and adapter

    IMG_1656.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Snowman56
    Snowman56 Member Posts: 6

    It shouldn't be frozen didn't have any water in til I discovered the problem I filled it tried to bleed air out the the individual loops and got no flow out of 3 of them

  • hot_rod
    hot_rod Member Posts: 26,546

    did you put the loops in? Observe the pour?

    I have seen anchor bolts drilled right across a pex tube. That stops flow.

    Kinks where the loops exit the pour is another possibility if they were not sleeved?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Snowman56
    Snowman56 Member Posts: 6

    I put the loops in. It is sleeved coming out of the floor but I did not personally observe the pour

  • rick in Alaska
    rick in Alaska Member Posts: 1,513

    Just to be sure. When you tried blowing through them, did you have the other end opened, for sure? If you did it one at a time , and only took off the line you are using, maybe something is crossed. In the bad situation you are in, I would take every line off and use air on each one to make sure both ends are open. I have a hard time believing you had that many loops get that compromised.

    Rick

    Grallerthot_rodHomerJSmithAlan (California Radiant) Forbes

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