Open the system drain which is hopefully at the far end of the system while you 
fill to get air out

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On Oct 12, 2016 8:38 AM, "Steele, Andrew" <> wrote:
Check valve failure, so that the sprinkler leg is no longer isolated?

-----Original Message-----
From: Sprinklerforum [] On 
Behalf Of Barry Levine
Sent: Wednesday, October 12, 2016 1:01 AM
Subject: Seeking false water flow alarm suggestions

I drained all the water from my pipes when I installed a new water 
filter/softener system in my home. After installing the new system, which 
replaced some 3/4" pipe with 1" pipe in my home water system, I have been 
getting false alarms from my Potter Electric Signal Co VS-SP flow sensor. I 
flushed my sprinkler system using the drain and the test valve, yet I believe 
some air pockets may still remain in my two areas of coffered ceilings, where 
the sprinklers sit 1 foot above the rest of the system. Potter recommends 
replacing the VS-SP with a VSR-ST. I'd prefer not spending the money to replace 
the sensor, but I'd like to hear from the professionals before I make that 
decision. I'm thinking there may be other solutions, especially since I never 
had any false alarms during the previous 20+ years. Possibly I could attach 
saddle valves between each of the two sprinklers in the two coffered ceilings 
and bleed the air out. Unfortunately, I've never had any long-term luck with 
 e valves, as they have all become inoperative over time. I've attached a photo 
of my water system in case that might be helpful. Feel free to ask any 
questions or offer any solutions. Thank you.

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