Thanks for the tips -- good stuff to know.
That is a very nice looking installation -- looks like you had some space to work with. I am going to be trying to jam this in below the sink, but I am not going to try to plumb the pump out through the Lavac pump, I have a "portable" hose and pump for that.
Looks like you plumbed in some sort of flexible plastic hose with the 1.5" sanitation hose -- what is it? Do you have problems with blockages, suction collapse, or odor leaks? I am going to need some way of making some tight corners, and it looks like you found a way to do this.
I already have a seawater intake seacock. I was thinking of plumbing some sort of y-valve into the water intake and run the shower sump through it (since my shower sump pump has also given up the ghost). That would be a way to run fresh water into the system, as would the simple expedient of spraying the telephone shower directly into the bowl and pumping it through.
-- Karl