I looked at a boat Sunday for purchase consideration and thought I covered everything but: I'm trying to remember thru hull valves. I saw a diagram from someone else that showed 'head and macerator pump' valves to the right of the engine looking aft. On the boat I looked at I remember two large black hoses at that location that went into a raised fiberglass square area, but I didn't see any valves. Can someone explain what I was looking at. Should I have seen valves there? I'm interested in this boat. I'm moving up from a trailerable Cat 22. Is it normal to always have a little water in the bilge with a docked boat?