[Land Yacht]

Dave,
Do you know whether the rear shower drain ties into the toilet drain pipe?  My shower is behind the rear toilet and would provide some additional water to keep the drain clear if they are tied together.

Steve, 
My understanding is that in the dump compartment there is a second manual valve behind the air dump valve which is a grey water bypass which enables all grey water to continuously drain while having the holding tank for black water only. If this is true, wouldn’t that mean all grey water is tied together and not joined with a black water device in proximity?