wet floor

[MikeMarie]

There is a spot between the bathroom wall and the bed that gets wet. There does not appear to be any leaks around the slide or anywhere else. I have a 2008 Jayco Melbourne 29D and I wonder if it could be coming from the black water wash. It seems to get wet following a dump and wash of the black water holding tank. How can I find out what is causing the problem? Help anyone???

[RedHorse1]

I think the black rinse has a vacuum breaker. I've read they are known to leak and are sometimes located in a cabinet above floor level. Since you mention the bath wall maybe below the sink?

[troutslayer]

On my RV when the vacuum breaker went bad I could see water leaking from under the RV directly under the black water tank rinse inlet valve while rinsing. Sorry for the run-on sentence

[oldmanAZ]

Originally Posted by RedHorse1

I think the black rinse has a vacuum breaker. I've read they are known to leak and are sometimes located in a cabinet above floor level. Since you mention the bath wall maybe below the sink?

X2 That would be the first thing to check.

[MikeMarie]

Thanks everyone but what is a "vacuum breaker"?

[oldmanAZ]

A device in the water line to the black tank. It is to prevent any chance of the black tank contents being sucked back into the water lines. If the water supply should fail and attempt to siphon water backwards in the system, the "vacuum breaker" would admit air and break the siphon preventing contamination of the water supply. Sometimes the internal valve sticks or fails and water leaks out when the black tank flush is used. It can be a little water or a lot.

Like RedHorse1 said, it is above floor level and usually a cabinet. Ours is under our bathroom sink, but that location may not be helpful to you.

[MikeMarie]

Thanks, I suspect that it would be under our sink behind a panel of course, with no room to crawl in. It does make sense since there is a boxed in area behind the toilet and the water could follow that track and seep into the carpet on the other side of the wall. Will let you all know how it goes.

[MikeMarie]

I found the leak, it is between the two valves that switch the water around from shore, to holding tank to winterizing, etc. I took out the valves and tightened them as much as I can and there is still a minor drip from one. I can't tighten them any tighter. They are connected to a couple of plastic tees and there are no washers between them. I tried to seal them with Teflon tape but don't know of any other way that could do the trick. Is it possible that I have tightened them too tight to the tee? It is driving me nuts. The drip is really very slight but maddening. We can't have a drip that continually runs into the carpet on the other side of the wall of the bathroom. Any suggestions???