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flow control valve

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steamfitter
steamfitter Member Posts: 156
in THE MAIN WALL
If a flow valve is installed on a vertical hot water line, what problems can occur? According to the B & G piping details, flow control valves should be on horizontal piping. At a friends home he has three zones on a radiant hw heating system with three circulators, each with a flow control valve on the discharge side of the circulator. Two are install in the horizontal piping, but the other is on the vertical piping because of a tight space where it breaks out of the boiler room. Is it worth re-piping?

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  • Paul48
    Paul48 Member Posts: 4,469
    edited November 2014
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    I can only state the obvious.....They must be installed per manufacturers instruction. There are different piping configurations for different flow controls.
  • icesailor
    icesailor Member Posts: 7,265
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    If what you are talking about is a flow valve like a B&G SA-1 1/4", I never knew that they were supposed to be installed ONLY with a horizontal flow, but I have no idea the number of installations (including my own) where the valve was used as a Tee. with the vertical pipe from the boiler going in to the bottom and the horizontal coming out the end with the arrow. There is even a split arrow embossed on the side of the valve body showing the valve can be piped either way but the valve itself must be installed in a horizontal plane.

    The weighted disk inside the valve must be able to drop down by gravity.

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