Hi All, Heading south on the icw, had an issue with my hot water heater. My fresh water pump started to run a few seconds at a time. Thinking I had a pipe or fitting leaking, I lifted the engine hatch. We had been docked for over a day. I found hot water & antifreeze gushing out of the plastic engine expansion tank. Cut off the engine valves to & from the hot water heater & all stopped. I guess the internal exchanger in the hot water heater developed a leak. Needless to say, I have to replace the 6 gal water heater-it's 14 years old. I am thinking of doing away with the engine exchanger, as if this had happened while underway, antifreeze could have gotten into the water system? I don't have much call for hot water underway, but it is an nice feature. Any input is appreciated.