Originally Posted by jcowles3
Another thought is to add water after it has been sucked dry to see if it's an after flush thing or a constant thing... Are you stationary while this is happening?
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Never moving when it happens...... You can't even get TO the rear bath when the slides are in.... That's why RB's have the second 1/2 bath; to use while on the road.
I DID try pouring a gallon of water slowly into the empty stool. It ran out and would not stay in there. I did NOT hear any belching or gurgling sound that would indicate (to me, anyway) that a vacuum existed.
This is incredible as the drain pipe from the stool is basically an upside down trap. There is no way the water should be able to run out UNTIL the water in the drain pipe is above the pipes highest point. And that highest point is level with a "line" that is nearly all the way up in the stool.
Yet that seems to be happening; water IS running uphill (seemingly).
Here is simple (crude) drawing to illustrate what I'm saying above.
Thanks for you interest.