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Old 05-24-2018, 10:36 AM   #31
HD Raptor
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Join Date: Sep 2017
Location: Beverly Hills
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Originally Posted by ptooti View Post
just a question to ponder it says on my unit that running the blackwater flush without having dump valve open can force unsanitary water backward into the system?
It can back black water up through the toilet or other areas where BW plumbing runs. Always have the BW valve open when you flush. Simple enough.

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Old 05-26-2018, 04:39 AM   #32
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Location: Utah
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Did the same thing but thank goodness it didn't damage the the black tank . I probably put about 30 gallons in before I realized it.

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