Water Heater Position

Next one up is where is best to place the water heater. I have heard that it is usually placed in the lazarette. Any other options and any advice re installation.

My water heater is under the cockpit on the port side. There is a shelf which appears designed for a water heater. What goes into the lazarette is the expansion tank for the diesel cooling system.

You need to crawl into the engine compartment twice a year to service the water heater. Thus make sure you give yourself access to the fittings so you can drain the tank.