We have a 2000 Carver 404 CMY and when my wife uses the shower in the aft stateroom, the drain is very slow, slow to the point that if you are not paying attention, the water will fill up on the bottom of the shower stall and run out over the edge onto the bathroom floor. I tried the obvious first. Unscrewed the drain cap and tried to see if I could get anything with a wire, but I was afraid of poking a hole in a hose. I even went to the ships store at our marina and borrowed their shop vac and tried to suck out any obstructions, but, that didn't seem to do it either. I finally gave in and called our boat mechanics and had them try to service it. When he got there, he and I looked all over for the sump for the aft shower. We took off every access panel we could find, but couldn't find it. A neighbor on the dock, who has a Carver 32' said that he had a hard time finding it on his boat, but finally located it under the bed in the aft cabin. We had the mattress up and the access panel off there as well, yet neither of us could see it. I have a feeling that it is indeed there, but damm'd if we could find it. You'd think a boat manufacturer would make some things easier to get to, but....yeah, I know. I'm dreaming. I am not even entirely sure that the sump is working, because when I try to observe a discharge when my wife is using the shower, I don't see anything. Of course I wait, because I know how a sump operates, but still, nothing. Makes me uneasy, to say the least, because I know that the water has to be going somewhere. Something else. In the galley, which is forward of the salon, there is an access panel in the hardwood floor. Underneath there is a small bilge area with a bilge pump there. This past easter weekend, I noticed several inches of water. Part of the problem was the pump--it needed cleaning. But, as for the water, where did it come from? It absolutely wasn't black water; we'd have noticed that right away. It is grey water, but not a clue where it could have come from. Is it possible, and I am only throwing this out as a possibility, that this water could have come from the aft shower some way? It doesn't seem possible as it is quite a distance away, but, these two showers in the aft and forward heads wouldn't share the same sump, would they? My fresh water tank is empty, and maybe, just maybe, it leaked out somehow? I know there is a pressure leak there somewhere as the water pump wants to run all the time fighting the pressure loss. But, since I generally keep that off, thereby having no pressure to speak of, not sure how water would get out of the tank. Anyway, the water did look like it could have been shower water, or just stagnat water. Also, that area has always, near as I could tell, anyway, been dry. Anyway, if anyone has a clue where this freaking sump is, please let me know. Thanks.