I've never done anything "special" to the dump hoses for storage. They are stored in a hose storage tube on the outside of the camper. As others have stated after dumping the black tank dump the gray tank and rinse hose with water, NOT using the hose used for drinking water. I keep a gray colored hose stored separate from the fresh water hose.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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