10-01-2013, 01:41 PM
I think you are talking about two separate pump systems. On my Tiara, the shower and head sink go to a "shower sump" in the mid ship bilge, then to the gray water tank on the forward bulkhead of the engine room. The gray water tank has its own pump which directs the effluent overboard. i never understood the two gray water pump breakers though. Hope this helps.
