Mystery leak

[Dennis and Carol]

About 3 weeks ago we noticed an intermittent leak. It appears as a wet area along the left side of the bottom step going up to the bedroom. Have pulled the wood grate from the cold air return and the white cover in the basement. There is no visible leak in those areas. Also pulled the panels on the shower, again bone dry. Thought it might be the V/B valve for the flusher, but it is also dry. Only water seems to be under one of the aluminum tubes and the linoleum floor covering, but no indication of how it got there. Thought maybe the kitchen slide might be leaking but can not see how water could get there without being visible somewhere else. Any ideas will be greatly appreciated.

[robb]

We had water in the same area of our 3400RL, found the leak was the water pump mounted under the shower. Had to pull the plastic panel in the basement to repair.
Robb

[boat391]

you might take a look in the pantry there is a light tan or grey plastic cover behind it is the water lines to your shower watch them when the shower is on bet you have one leaking just a guess on my part don't know what model you have mine is a 3400 and that was my fix good luck if I can be of any help just pm me

[rlrich]

If you notice the leak soon after you've used your black tank flush, it may be the vacuum break leaking. Not sure where yours is located but mine is behind the shower.

[Dont]

Hi I had a leak when i flush my black tank it was the vacuum break. I had to cut a hole in the wall in the cabinet to get to it. Their was allready a hole in the wall but I couldn't get to the vacuum break. We are full time so I couldn't take it to the dealer to be fixed,does any one no wheir I can get a vacuum break. I have a 2007 3400 RL .