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Starting Member


Monday, May 29th 2017, 2:38pm

Adding a Drip System to a Raised Bed

I have an existing lawn irrigation system with a pressure vacuum breaker device (3/4" Febco 765) placed 2' above the highest sprinkler head per local code. I'd like to add a zone to water some plants that are located in a raised flower bed that would be around 1' above the PVB. Do I need to move the PVB, or can I install a simple check valve on the new zone to stop water from the higher area from flowing backwards?


Supreme Member

Posts: 5,331

Location: Metro NYC


Monday, May 29th 2017, 3:55pm

Raise the PVB.


New Member


Monday, December 4th 2017, 2:58pm

hi - sorry for dredging up this old thread. So the requirement for having PVB (or anti-siphon device) is that they are (in our case 12") higher than highest sprinkler head (or drip emitter). We have some pretty tall garden bins (maybe 4 ft tall)

What do people do in situations like this? Double-check valves and pay for yearly testing?


New Member


Monday, December 4th 2017, 3:08pm

Or, I guess, can't I install check valve on the drip line?

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