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[quote='roaddawwg',index.php?page=Thread&postID=13272#post13272]a friend of mine had a leaky backflow device so i replaced the valve undder the bell housing. it seemed fine,we adjusted all the heads andwent home. the next day it started pulsating getting louder as the zones advanced and it squirts out the top of the backflow device each time it pulsates. so we replaced the whole backflow device and it still does it. was this simaler to your experience? we are stumped.[/quote]

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The last 6 posts

Thursday, June 24th 2010, 7:35am

by Wet_Boots

try reducing the flow in one of the zones, and see what happens

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Wednesday, June 23rd 2010, 5:27pm

by roaddawwg

pulsating system

a friend of mine had a leaky backflow device so i replaced the valve undder the bell housing. it seemed fine,we adjusted all the heads andwent home. the next day it started pulsating getting louder as the zones advanced and it squirts out the top of the backflow device each time it pulsates. so we replaced the whole backflow device and it still does it. was this simaler to your experience? we are stumped.

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Tuesday, June 22nd 2010, 8:29pm

by hi.todd

After noticing that it is happening on all of your zones. Solenoid may be failing on your master valve if you have one.

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Tuesday, June 22nd 2010, 8:27pm

by hi.todd

Also it could be that your solenoid is failing and you need to change the valve.

I just saw this on an old valve that has been in since 1985. I expect there to be more out there.

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Tuesday, June 15th 2010, 4:09am

by Wet_Boots

Undersized supply plumbing in comparison to the flow in the zones

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Tuesday, June 15th 2010, 12:40am

by slacsteve

System pulses on all circuits

What would cause my system to pulsate while sprinklering?

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