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Old 10-17-2017, 11:22 AM
 
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My first winter in New England. I know the water should be blown out of the sprinkler system before freezing. But do I need to remove the PVB back flow and take it inside.
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Old 10-18-2017, 07:13 PM
 
Location: Forests of Maine
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Quote:
Originally Posted by Autumn70 View Post
My first winter in New England. I know the water should be blown out of the sprinkler system before freezing. But do I need to remove the PVB back flow and take it inside.
A 'back flow' preventer valve is to protect your potable water system from contamination. I would be very hesitant to remove it, ever.

In theory your system should be a drain located at it's lowest point. Where you can fully drain all of the piping. Then you can blow compressed air into each of the high points [sprinkler heads].

Unless we are discussing a low-pressure hydroponic dripline system, in which case forget everything I just said.
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Old 10-31-2017, 02:02 PM
 
Location: Phoenix, AZ
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OP, no, you don't take the back-flow preventer out when winterizing your sprinkler system. If there's no water left in it during the winter, there's no expansion and no damage to the unit. Voila!
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