I'm kicking around the idea of installing a wirsbo fire sprinkler system at my house. Now, my concern is that I live in Missouri, and while we don't see the extremes in temperature that a lot of you see, it still freezes here. So while the idea of insulating the system isn't bad, it just won't cut it in a non flowing system at 5 degrees outside. So here's what i'm thinking; I seperate the sprinkler system from the rest of the potable system with a pressure reducing valve set to 80 psi. Immediately after the PRV I put in a tee, terminating the branch with a gauge assembly. When the system is complete, I pressurize the sprinkler side of the system to about 90 psi, then turn the water back on. That should keep water from entering the sprinkler side unless their is a pressure drop, which would hopefully only be when high heat sets off a sprinkler head. Thoughts? Suggestions? Better ideas?
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