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The last 10 posts

Thursday, November 6th 2014, 6:39am

by Wet_Boots

You seem to be intent on fixing something that isn't broken. Can you elaborate on just why? The spilled water is not a health hazard, and you probably haven't yet tried lowering the zone pressures with the flow controls on the zone valves, which would reduce any spilling.

Wednesday, November 5th 2014, 9:52am

by sdgardener

Thanks Wet Boots! Which inline sprinkler valve do you recommend?

I heard that some breakers occasionally eject some water, do you know a good spill-resistant pressure vacuum breaker?

Wednesday, November 5th 2014, 4:51am

by Wet_Boots

They do not. That's where the hundreds come in. Install a Pressure Vacuum Breaker, along with underground valves, and no water exits anything but the sprinkler heads.

Wednesday, November 5th 2014, 1:29am

by sdgardener

Do inline sprinkler valves have the same problem?

Tuesday, November 4th 2014, 8:27pm

by Wet_Boots

How many hundreds of dollars are you willing to spend to make this go away?

Tuesday, November 4th 2014, 6:39pm

by sdgardener

strange thing happened. After I replaced the two spring-loaded sprinkler heads with regular heads in zone 3, water not only gushes out from the anti-siphon cap of the 3rd valve, but also from the 5th valve again. Any ideas?

Monday, November 3rd 2014, 8:05am

by Wet_Boots

You might complete the experiment by switching back one head, and see what results. This isn't strictly about the spring-loading, but about whether the heads can gush water when they are not completely popped up. (sometimes called "flow-by")

Sunday, November 2nd 2014, 7:37pm

by sdgardener

You are absolutely right! After I replaced the two spring-loaded sprinkler heads with regular heads in zone 5, no water gushes out from the anti-siphon cap of the fifth valve any more. Now water gushes out from the anti-siphon cap of the 3rd valve because there are two spring-loaded sprinkler heads in zone 3. I will replace them with regular heads tomorrow.

There are no spring-loaded sprinkler heads in zone 1 and 2. There are spring-loaded sprinkler heads in zone 4. But they are located downhill. So I don't expect the same problem in that zone.

Thank you very much for your help!

Sunday, November 2nd 2014, 12:11pm

by Wet_Boots

Not from the information you provided. In any event, this 'flow-back' has been known about for decades, and the anti-syphon valves are still code-approved.

Sunday, November 2nd 2014, 10:25am

by sdgardener

Thank you very much your inputs. The fifth zone do have two spring-loaded sprinkler heads. But zone 1-4 also have spring-loaded sprinkler heads. Any idea why water gushes out only from the anti-siphon cap of the fifth valve?