Customer has no hot water and a big puddle of water in the garage which is opposite the outside water heater closet. Upon diagnosis the water heater is 20+ years old and leaking from the tank, recommended a new water heater be installed. Removed the old water heater and installed a new 40 gallon low nox Bradford White water heater. Installed some b vent where the venting touched the roof since it was single wall and dangerous. Installed new water flex lines, gas valve and flex line. Installed new expansion tank and connected the t&p. Turned the water on with no leaks, turned the gas on and the water heater is working perfectly.