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?