I bought a reliance natural gas from a local overpriced hardware store, so far its fine. The diameter of the water heater was several inches larger since that last one I bought was from sears and all the sears around here have all went out of business, so it was a tight fit in the hole where the water heater fits at. I didnt know this until went to put it in. I stayed away from lowes and home depot specifically because of the reviews online. There were too many junk ones mixed in to take a chance with it. Menards has them also and were cheaper, buy after cross referencing them they are worse then lowes, they were a value piece of crap water heater