Arrived at the location and spoke with the homeowner. Turned off the main ball valve to the house and began draining the old water heater. Replaced the leaking ball valve on the cold side of the water heater with a new one. Reconnected both hot and cold water lines and repiped the gas line to the water heater. Refilled the water heater and flushed the entire plumbing system until water flowed consistently through all faucets and tubs. Waited for the water heater to reach operating temperature and confirmed proper functionality. Walked the homeowner through the completed work. Job completed