Customer had been told that her water heater was leaking and needed to be replaced. Upon inspection, found no signs of the heater leaking. Informed customer of this and made customer aware that while the heater isn’t leaking, it is nearing the point of proactive replacement. The manufacturer date was January 2016 and heaters have an average lifespan of 8-12 years. Customer opted to move forward with the proactive replacement. Installed a new 50 gallon gas heater with a new pan and thermal expansion tank. Reconnected to the existing gas, water, and vent lines. Tested all work to ensure proper function and no leaks. Found no leaks on the water lines, and the vent lines were working properly. Found a gas leak from a bad flare connection on the gas line going to the water heater. Reflated the connection as a courtesy to the customer and left a quote to replace the soft copper line with trac pipe. Tested after flaring the connection again and found no additional signs of leaking. Left a quo