On our 2015 Montana 5ver, when the black valve is closed exit pipe continues to drip. There seams to be some kind of debris in seal preventing it from completely sealing. Is there any kind of chemic...
The quick way to try Is get the add on drain back flush attachment The clear one with the hose attachment I never had clogging or dripping problem When I used one of those on my RV I can't use it on this RV with out making some mod , It's a clearance problem in the compartment
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