Im trying to figure out what the system is, I dont have a manual. It has the 2 hoses attached to the toilet but the toilet is (or actually was, i threw it out) a porta potty. I want to put in one of the nicer jabsco manual units, looks like it hooks right up to the inlet and outlet hose. Outlet hose seems to split under the sink and i assume one goes either to pumpout opening or holding tank and one under engine thru hull out for releasing when out on ocean (3 nm). That one goes thru macerator i think. Ive never used a system like this and dont know whether water is taken in from sea or from water tank? Dont see any seacocks only on new toilet itself. One of my worries is water getting in and flooding the boat if i dont hook this up or use it correctly. How would i figure out if theres a holding tank does anyone have this model boat and know for sure if it comes with one? If someone can shed light on any of this id appreciate it...