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Can an RPDA (reduced pressure detector backflow assembly) failure cause a sprinkler activation?
The street pressure at our project is 140 psi. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
6 Comments
Franck
5/30/2022 08:43:31 am
Normally not with closed sprinklers (bulbs / fusible link) as the maximum operating pressure is normally 175 psi (or more) and wet systems are normally tested at 200 psi for 2 hours.
Alex
5/30/2022 09:56:46 am
I think Frank hit all points on the money!
robert bennett
6/1/2022 10:18:14 am
My question would be:
Jesse
5/30/2022 10:17:30 am
It shouldn’t. The AS system is hydro-tested to 175
Dan Wilder
5/31/2022 08:43:00 am
As I sit on a site where the working pressure is 165 for the last 12 years...no.
Casey Milhorn
5/31/2022 09:04:33 am
In theory (if working properly), the RP will equalize pressure and prevent excess pressure from being trapped on the sprinkler system side of the RP backflow device. This is good and bad compared to a traditional backflow device. A traditional backflow will allow excess pressure (water hammer) to become trapped on the sprinkler system side of the backflow. So if you ever do get a spike for whatever reason, the pressure will be retained until a decrease in temperature, pressure is relieved from a drain, or pressure is relieved from leak points in the system. The good thing about a traditional backflow is that once a spike occurs the system should retain the excess pressure and not see water hammer. As far as the overall plusses or negatives of a DCVA vs a RPDCVA, I would say it's a toss up. To the original question, I'm not sure how a RPDCVA or RPDCDA could impact the system in a way to cause a head malfunction. Leave a Reply. |
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