I am finding water that is constantly leaking in a small drip like fashion from under the hot water heater area. I can find no evidence of water inside the compartment bay where the hot water heater is located. This unit obviously does not have a drip pan similar to a residential hot water heater but my first thought is that the water heater is leaking and that it is time to be replaced. Before I start disassembling all of my plumbing I would appreciate some comments from the pros as to what else I may need to look at or consider. Thanks.

Note: The water is not dripping from the drain tube located under the bus, but rather in an area about 8" diameter around the drain tube location.