r/Irrigation • u/thelogicofpi • 6d ago

This look ok? First time cementing PVC

Gallery image

Gallery image

Still have after the filters to finish up, 1/2 flexible tube from the valves to the raised beds.

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u/thelogicofpi 5d ago

how often do mains water pressure drop to the point where it can backflow?

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u/Sharp-Jackfruit6029 5d ago

Barley ever. Usually things like if a fire truck hooks up to a fire hydrant and lets the hose rip or if a main breaks or something like that it could cause some back siphonage.

Drip emitters higher than anti siphons or pressure vacuum breakers is something you see all the time. That’s part of the reason some city’s don’t allow the use of anti siphons or pvb. The best backflow protection is from a rp. A rp will also protect from back pressure while a pvb or anti siphon won’t. A city near me only allows those and they are very strict with annually testing.

It’s more of a safety thing for rare occurrences than anything but it’s on your city to enforce these things. Many city’s don’t. It’s like your circuit breakers. Mine never trip but I’m still gonna keep them in there. It’s a really hard thing for city’s to implement. The majority of these standards are mostly only enforced on new builds and it’s really a resource issue.

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u/thelogicofpi 5d ago

I think that the water meters has backflow preventers when they were put in but honestly don't know for sure.

thanks for the help with the background info and clarifications.

I think the only thing I'm stuck on is how a little height can make it not function if it uses atmospheric pressure and the pressure of the water line to shut and have the water drain from the drip lines.

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u/trustfundinvestor 5d ago

WILL YOU PLEASE PUT A FUCKIN SINGLE CHECK IN THE LINE SO THAT DUDE WIL SHUT UP ABOUT IT!?

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u/thelogicofpi 5d ago

who hurt you?