Originally Posted by Parrott
Some have replaced them with a check valve. If mine gives me problems, Iíll just remove it and straight pipe it.
That is what I did on my old trailer when it started leaking. I also, added a screw in shutoff valve where the hose attaches. I would turn the added shutoff valve off first when through rinsing black tank, then turn the hose bib off before disconnecting. No chance of any back flow turning the added valve off first while under pressure.
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