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Backflow preventer and prv's

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mtfallsmikey
mtfallsmikey Member Posts: 765
in THE MAIN WALL
Especially if you have to use an RPZ type backflow preventor. Flush the line first tho.

Comments

  • bovide_4
    bovide_4 Member Posts: 161
    thinking out loud

    Would a viable solution to backflow preventor discharges be to pipe them after the prv to be on the low pressure side?
  • Timco
    Timco Member Posts: 3,040


    No...clean the check or allow the water in the fill line to acclimate. Check wants full house pressure, then PRV.

    Tim
    Just a guy running some pipes.
  • tim smith
    tim smith Member Posts: 2,886
    prv bfpi

    We have had to change quite a few that people have put on the outlet side of the prv, no pressure differential for the bfpi to see so it opens up. Also make sure to put a Y strainer before the bfpi, this will save some service calls.
  • Dave Belisle
    Dave Belisle Member Posts: 68
    Water hammer

    Water hammer can cause a small discharge from the backflow especially an RPZ.
    We install a simple spring loaded 1/2 check before the backflow.
    That stops the small discharge from water hammer.

    Dave in NH
This discussion has been closed.

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