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Posted on 1/28/19 at 6:46 pm to TigerTatorTots
Backflow preventer freeze protecrion
I can’t load the pic so you will have to check the link. Turn off plastic (PVC) ball valve at ground level. Make sure pipe is insulated to this point and covered. Leave open the yellow circled valves on backflow and open red circled check valves with screwdriver to release all water. Cover backflow with insulated cover or wrap with towel and cover with garbage bag.
I can’t load the pic so you will have to check the link. Turn off plastic (PVC) ball valve at ground level. Make sure pipe is insulated to this point and covered. Leave open the yellow circled valves on backflow and open red circled check valves with screwdriver to release all water. Cover backflow with insulated cover or wrap with towel and cover with garbage bag.
Posted on 1/28/19 at 8:25 pm to TigerTatorTots
Marlo got it right. Turn off the ball valve below the back flow preventer and open the 2 bleed screws on the side to allow expanding water to escape. The part that breaks when it gets cold is a plastic part in the top of the back flow. If you drain all the water out of the casting, you should be ok.
Posted on 1/28/19 at 9:15 pm to Ron Popeil
If it gets cold enough the ball valve on the backflow will freeze and crack if it isn’t insulated properly
Posted on 1/28/19 at 10:40 pm to TigerTatorTots
Won’t get cold enough to matter down here this year just turn water off.
Posted on 1/28/19 at 10:47 pm to 257WBY
quote:Yea looks that way. Just bookmarking this thread to come back to in the future
Won’t get cold enough to matter down here this year just turn water off.
Posted on 1/29/19 at 10:52 am to auggie
Thanks baw
Posted on 1/29/19 at 10:54 am to 257WBY
I replaced over 50 backflows last year after it got in the 20’s for a few days. Many of them blew up at the ball valve, splitting the brass casting.
Posted on 1/29/19 at 7:35 pm to Ron Popeil
Anything below 24 is a problem especially when you have 10+ hours below freezing. I replaced quite a few brass ball valves the last few years and now I install pvc ball valves underground on all new irrigation systems to prevent this.
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