My guess is the flow switch is doing exactly what it is supposed to do. 
Replacing it would give the same result as the working flow switch already 

The check valve would, if working, allow water at a higher pressure into the 
sprinkler system leg only once and then it would check shut.   Then as the 
domestic side of the system has routine pressure fluctuations, for example when 
domestic is used for a hose or toilet flush, the sprinkler leg is isolated from 
the variability of the domestic.   No flow, so then there's no alarm.

On Oct 12, 2016 9:53 AM, Barry Levine <> wrote:
> The check valve prevents water from coming back down and entering the home 
> system, not the other way around, but I'm open to exploring any options. Any 
> suggestions on how to check and repair this? I'm not sure if the picture was 
> attached, as I can't see it here, so I'll give a link to it: 
>!AnhFeJX0YorirQUGGBIOXAy4RUu2 The check valve is just 
> below the flow sensor. It probably would be more cost effective to replace 
> the flow sensor than the check valve due to limited space and accessibility 
> for changing the check valve (soldered copper with no unions). I would have 
> no problem draining the system, opening up the check valve and repairing it, 
> if it is repairable. What do you suggest?
> On 10/12/2016 5:38 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 To: 
>> 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 saddl 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. 
>> _______________________________________________ Sprinklerforum mailing list 

Sprinklerforum mailing list

Reply via email to