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Back Flow for black tank flush.
Was packing up this weekend camping trip with grandson, when I hook hose to blk tank flush, water ran into basement area. Track it down to back flow preventer or what some call that black gizmo . Got home took it off and to my surprise, I found three dead stink bugs in the preventer. Removed them put back together and no more leak, just one more reason squash the nasty little bugs.
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