Originally Posted by us71na
I would suspect that the drain valve was partially open since you lost water before you ever left your driveway. I doubt that you would lose much water out the vent while setting still.
It ABSOLUTELY happens. My overflow tubes would run for a long time after I quit putting water in and I didn't have it going in under huge force. I actually put a 5 gallon bucket under the overflow tubes and found that it puked out almost 15 gallons just sitting still in the driveway. Once you start travelling, turning, bouncing down the road, I've lost over 1/3 of my tank before getting to the campground. Just check out this thread if you don't think so. http://www.jaycoowners.com/forums/f7...ukes-3503.html
The first several pages are postings by non-believers trying to find another reason for the water loss. The last 3 or so pages have a quick and easy solution that actualy works.
It's happened to me and to lots of Jayco and Starcraft owners. It is a design flaw that the company never seems to address, although the fix is very easy.