great price and quick delivery. the pipe threads were correct for installation on my water heater, the threads were correct for the pilot and thermocouple. my old unit had a 3/8" line to the burner and this one was for a 1/2". ( burner tube ) I had an old burner tube from another unit that I cleaned up and used. I was going to purchase a new one but could not find it online or locally. Works great. Plenty of hot water now.