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drip irrigation with a down stream valve

Posted by pull-do none (My Page) on
Sun, Nov 25, 12 at 19:00

Had a irrigaiton meter put in at the house,, 3/4" line, brought it in to property, elevated to 2' and left it with a cut off valve, I was going to install a drip irrigation to the raised planter boxes, (vegetables),citrus trees, and then a stand of containers along with a protected area for tomatoes and whatever,,, the problem I have is I have to put a anti-siphon valve first off the main line, no problem I'll do it, but from there I planned on breaking the header off into 4 different runs and installing a block valve out at the end of the one run towards the end of the property for future "hose dragging",,, all my research says there is "no" anti-siphon valve recommended with a block valve downstream.
I was hoping somebody could recommend a anti-siphon that would work with a downstream valve that I could get by the city codes. City is no help, they're clueless, just has to pass inspection,,,, duh!
thanks for reading such a long winded post,
Paul


Follow-Up Postings:

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RE: drip irrigation with a down stream valve

pd,

Are you interested in protecting everyone's(including your own)water supply from bacterial contamination or find a way to circumvent the bureaucratic no-sense municipal water regulations? Aloha


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RE: drip irrigation with a down stream valve

My whole yard is on drip. I have 14 systems the only anti-siphon valve I use is on the four way manifold. I got all my parts at lowe's and home depot.


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RE: drip irrigation with a down stream valve

It is important that the backflow preventer be higher than any outlet to prevent siphoning. All irrigation systems have zone control valves downstream of the backflow preventer so I cannot see how installing a hand block valve would be a problem.

If you are running a hose uphill from the valve you would need the backflow preventer to be higher than the highest point you want to irrigate.


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