Re: Sewage pumping up hill.
I have a "Sewer Solution" that I purchased over a year ago.
I have never used it to push uphill, but it is my sewer connection where I am parked.
I have it hooked onto the dump pipe and then it runs through a wall, 40' across a garage floor thru a 3/4" garden hose to a conneection I installed in a sink drain pipe at the floor.
We have a toilet in the garage, so only liquid goes in the RV toilet. Works great for my application.