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Connecting circulators - flanges

OffRoadAudio
OffRoadAudio Member Posts: 5
in Radiant Heating
Hello - simple question please. I just purchased a Grundfos circ for a wood-fired radiant system that I am building, and there are no instructions as far as how to connect the flanges. Seems simple right? But I obsess over little things. So the O-ring is in between the flanges, but I feel like if I tighten it so that the flanges contact each other - the O-ring will split. So how tight is too tight? Do I go all the way?

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,214
    Snug it up,

    but don't wail on it.  Turn on the water and if it leaks, snug it up some more.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • OffRoadAudio
    OffRoadAudio Member Posts: 5
    Thanks

    Thanks - I was aiming for that, but wondered if there was a method to it.
  • RobG
    RobG Member Posts: 1,850
    Method

    There is a method to it, and Alan just gave it to you. :)



    Rob
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