Mark Heron wrote:
RJ's I was hooked up to city water, the campground did not have sewer hook up.My black tank is 37 gallons, the portable tank we were using was 28 gallons took us twice to dump black tank so I feel fairly comfortable with my estimate.
Ok, I'm convinced the tank is ok.
Why not shut the water off at nite, make sure that the turlet valve is the problem. But right,......why don't you see the water running.
In 40 yrs of RVs, I have never had a turlet valve leak water.
Bowl seal fail, yes, but never concerned me much. But they are not hard to change,