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Irrigation system leg issues- knocking and low flow rate

Posted on 6/27/21 at 8:02 am
Posted by OMWsux
Member since Jan 2015
184 posts
Posted on 6/27/21 at 8:02 am
I am having difficulty purging air from an irrigation leg. I’ve removed sprinkler heads, let the system run for 30 minutes, and the line is still knocking. It is the only leg I’m having issues with. Any suggestions for flooding this leg? Would it help if I fab a connection to hook up a hose pipe into the leg?

Some heads receive constant flow, albeit with low pressure. Some sputter and knock. Some do nothing.

ETA: I’ve located the valve and the solenoid is clicking. I will replace to see if it fixes the issue.
This post was edited on 6/27/21 at 11:42 am
Posted by CrawDude
Baton Rouge
Member since Apr 2019
5819 posts
Posted on 6/27/21 at 8:30 am to
Is ii possible you have a crack/loose joint in that irrigation leg usually around a line restriction, causing a Venturi effect (drawing air into the water line as water moves rapidly through it)? Something to consider.
Posted by Daponch
Da Nortchore
Member since Mar 2013
1158 posts
Posted on 6/27/21 at 5:04 pm to
Turn the valve on manually and not with the controller. If it functions correctly then you know the solenoid is malfunctioning
Posted by texn
Pronouns: Y'All/Y'All's
Member since Nov 2019
4096 posts
Posted on 6/28/21 at 12:48 pm to
Flowmax for the low flow problem and Ropinrole for the restless leg syndrome. Worked for me...I can pee like a racehorse but not kick like one in bed.
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