I have a Pressure Vacuum Breaker (PVB) that I've installed that is 12" above the highest point of sprinklers, as recommended by install guides.

I'd like to add a hose bib downstream of the PVB. If I tap into the PVB, and the hose bib is 12" off the ground, do I need to raise the PVB 12 more inches?

On a related note, if I'm using one of those pop up sprinklers that pops up 8", do I need the PVB to be 12" above that when it's extended? Or just when it's not in use?

  • Did the guide say 12” or at least 12”? Because if you mounted it higher none of these questions would need asking.
    – Solar Mike
    Commented Jul 21, 2021 at 11:53
  • @Ecnerwal thanks, done.
    – chizou
    Commented Jul 21, 2021 at 17:46
  • @SolarMike at least. But my line of questioning is do I need to do the additional work to move the PVB higher or not? I don't want to do unnecessary work.
    – chizou
    Commented Jul 21, 2021 at 17:47


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