My water heater has a 40 gallon capacity and uses natural gas. Its model code is SG40T12AVG00. It has a manufacturer's warranty that covers parts and labor during the first year, and parts only during years 2 through 12.
Initially, I was satisfied with the water heater.
Then, when the heater was about 2 years old, I discovered the leaks, and I became UNsatisfied. By comparison, one of the two inexpensive, original water heaters in my house was 10 years old before it leaked -- the other one is now 13 years old and still doesn't leak. And, in my two previous houses I had inexpensive water heaters and no problems, of any kind, in 14 years.
- I do not recommend this product.