Moved the wall above the propane tank to make room for my propane hoses and accessories. (Pic 1)
And cut a hole in the wall hiding the water tank, to give myself a window to see my water level. (Pic 2)
Extended all three vents from my water tank and added ball valves, to stop the siphoning problem. Two were sent over the top of the tank and back down into a storage bay just aft of the propane compartment, then out the bottom. (Pic 3) The ball valves are in the bay before the exit holes.
The third vent went over the fuel tank (higher than the water tank) across and forward to the wet bay, terminating with a ball valve by the Thetford sewer hose pipe I installed earlier this year. The reason I put the third one there is to establish the air gap that Rustynuts and others mentioned, as well as its visible to me as I fill my tank or move my valves to dry camp setting.
Tested the ball valve fix two different ways;
#1. All 3 open while filling, the two on the passenger side began flowing first when the tank reached full.
#2. Since I was sanitizing my tank anyways, I drained it completely, closed the two passenger side valves and filled again. Watching very, very closely, at 69 metered gallons, the wet bay valve began gurgling noises, I then slowed the fill rate to about 1/3. Looking under the chassis at the extended clear hosing leading to the ball valve, I could see it pushing air through the water that was trying to go uphill. So the tank was venting but it couldn't start siphoning, yet anyways.
Being one to push things, I waited until the water finally flowed out the wet bay ball valve, this was after all air had been vented. I don't think this was siphoning though, just water with nowhere else to go.
Knowing that I will fill my tank with all the valves open (like I did in #1 above) until the passenger side valves start flowing, then close them and leave only the wet bay side open after that for travel, I hope I've solved my siphoning problem. And with no need to ever close the wet bay valve, I hopefully won't create a problem even if I do forget to open the two passenger side valves for filling or water pump usage.
Fingers crossed.
(Pics of ball valves will be added tomorrow, forgot to take them today)
Oh, Pics 4,5,6,...stuff Jayco left sitting on the frame rails that I found after 3369 miles of travel. Yes, that's angle iron that miraculously never fell from the frame, next to the fuel tank, and into my Jeep Toad or the motorist behind me.
Attachment 82787
Linear Mode
