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Connecting circulators - flanges

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?


  • Snug it up,

    but don't wail on it.  Turn on the water and if it leaks, snug it up some more.
    Often wrong, never in doubt.
  • OffRoadAudioOffRoadAudio Posts: 5Member

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

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

This discussion has been closed.


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