Homeowners water heater was leaking from the top of the unit. Unit was around 8 years old. Shut water off at the main and drained system down. Disconnected the electrical from the unit and drained tank down. Cut out CPVC piping water lines and removed the failed water heater. Transitioned CPVC to copper piping. Set a pan in place and raised water heater. Capped off the pan. Ran new copper piping to the water heater. Installed the extra anode rod in the hot side outlet. Installed new ball valve for the cold inlet and ran new section for the new thermal expansion tank. Secured the expansion tank to the wall and pressurized to 70 psi. Ran new line for the T and P relief line outside and sealed the penetration hole. Turned water on and tested. Purged air from the system. Turned on electrical to the unit. Everything is working properly at this time. 10 years old warranty on the unit.