Did you ever attempt using a Flush King to back flush and rinse that tank? Just wondering because generally speaking it is another way of forcing water into an enclosed tank for cleaning/rinsing.
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Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO
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