said by NS4683:said by DarkHelmet:I had the same thing happen a few months ago. I removed the service panel on the unit and found it was coming out of the heating element around the threads then dripping down in the insulation so there were no visible signs of a leak. It sounds like you have the exact same issue.
The OP has a gas water heater, so he wouldn't have heating elements like in an electric heater.
The element is a lot lower but the same issues could happen.