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Blowout through a doublecheck.

jcom

LawnSite Senior Member
Location
Bismarck, ND
I need to winterize a system with a doublecheck valve. I seem to remember that not all the water will be blown out if I go through the valve so my question is this. Will enough water remain to cause a freezing problem? Or must I take the valve apart for drainage?

Thanks,

John
 

Wet_Boots

Banned
Location
metro NYC
A Doublecheck like the Febco 805Y might need some partial disassembly - specifically the downward-pointing check valve cap. I used to set those at a 90° angle, with the testcocks pointing down, and the check valves on a level plane, so no disassembly was required.
 
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