Originally Posted by jeepbluetj
The other reason is fresh water flush - flush with water from the sink.
Agree with the others - engine thru hull should not be teed in with the galley
drain due do junk being washed down and sucked up into the engine cooling
Also, I would worry about the engine sucking air down the sink rather than water up through the thru-hull, causing bubbles in the engines heat exchanger
and/or failure of the raw water impeller, either of which would cause the engine to overheat. If you are going to "T" an intake, both things it leads to should be either outward or inward flow items and you may need checkvalves in the case where one item creates a very strong suction.