We have never had a problem with our water line freezing in 30 degree nite temperatures, so long as it warms up in the morning. Had our black tank freeze solid one winter in Colorado, but that is a different horror story.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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