Quote:
Originally Posted by beeryboats
I'll look for the check valve under the sink. It's strange that the roof vent is closed, it only happens after being on the road for a while, and there is water in the bowl. I don't think it's from the gray tank either.
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. Just so you No most RVs don’t have a P-trap for the shower only the the sink’s, this is why if you leave the black and the gray open together you can get the sewer smell from the black, just saying .
Of course I don’t know how yours is plumb
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Miramar 2017 34.2, roadmaster front & rear sway bars, sumo shock, Roadmaster stabilizer bar, Koni shocks, F150 crewcab coyote motor , 2004 40th #26th edition 911, E350 2 door coupe, Mini Paceman 2013 6 speed manual toad/ RV