The 322 version
I don't know if our situations are the same, but given the similarities between the 302 and 322, here's what I've found on my boat (with a balky shower sump).Not wanting to destroy the seamless floor in the head, I tried tracing the hose line from the sump under the floor to wherever it dumps overboard. I think I spotted the culprit -- an as-yet-unidentified pump attached to a bulkhead in the portside lazarette. I'm going to get a second opinion from a knowledgeable friend, but I think it's a remotely-located shower sump pump. I guess one other way of diagnosing it will be when I reinstall the batteries. I'll hit the sump switch and see if the mystery pump kicks in.I'll let you know what I find. Good luck to us both.Petes/v EmmieLou (O-322)Little Silver, NJ