I moved in to a house about 3 years ago and have noticed a trickle of water starting to pool at the base of the water heater. The heater is a Reliant 501. I know alot of houses with attic water heaters in Texas are burstin because of the heat. But mine is inside and the leaking is not substantial. My first thought was a spill, but after cleaning it up the pool came back in about two hours. Any other thoughts?