Trailering with a Jabsco manuel head

[WallyQ2]

I have a novice question for a novice head. Is it normal for the bottom of the bowl to have about an inch of liquid in it, or is it supposed to be BONE DRY with the switch in dry mode.I recently trailered 2000 miles and when I left I thought the bowl was empty, but the waste storage tank was 1/3 full. When I got home I found the blue/green waste additive splashed all over the head floor, which had come out the toilet bowl. (Great fun to clean up)I assume during the drive the waste sloshed around in the tank & some went back down the top discharge hose back to the head bowl and splashed out with the trailer movements. (switch was in dry mode) I put it in wet mode and pumped out the backwash and pumped again in the dry mode about 50 times. There is still about an inch of clear water at the very bottom, and it never gets bone dry. Is that normal? (I'll now put saran wrap over the bowl when trailering.)

 

[Peggie Hall HeadMistress]

This is one time that a new joker valve may be the solution

You'd have had to flip the trailer for anything in the tank to slosh around enough to jump all the way up the inlet fitting. So I think three things are going on here: 1. you have an uphill run from the toilet to the tank...2. you aren't pumping in the dry mode long enough to move bowl contents all the way to the tank...you're leaving it sitting in the line to run back down into the toilet...and 3. The joker valve in the toilet is worn out. The proof: I'm betting the last thing you flushed was your tank chemical. That's what ran back into the toilet 'cuz it never made it to the tank. The joker valve (cup shaped rubber doodad that has a slit in the bottom and "lips" on the outside, located in the toilet discharge fitting) won't prevent slow seepage, but it will prevent a real of flow of water back into the bowl until it's worn out...till the slit has become so worn and stretched that it's no longer a slit, it's just a hole. Joker valves should be replaced at least every two years, better yet, every year. So the solution is: replace the joker valve and pump a lot longer in the dry mode.