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cmcusn

water lines froze, now have water running off of roof

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I was unable to properly winterize my 2017 discovery lxe, 40x, motorhome.  went to prep for a trip, had to change out the toilet valve and turn the ice maker supply line off.  When i turn the water on water will run off the roof.  Has me baffled totally.

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Possibly you've got fresh water running into the black tank, likely through a leak in the toilet. Wouldn't be the first time that a black tank overflowed through the roof vent and over the top of a coach.

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Your only option at this point would be to have someone turn on the water while you stand on the ladder, see where it’s coming from. 

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I am wondering how large the stream is coming off the roof. Never heard of a leak off the roof from fresh water except as Ken and

Richard suggested. Even ice makers are usually plumbed below the roof.

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Brett, good thinking!  Also, if he has heat pump with AC and line is frozen or blocked it will overflow on roof!  OP is in an area that dips cold at night only...Between 30/40 degrees the heat pump will show ICE.  If your not in coach then the water will run when it thaws.

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