Install new 50 gal gas water heater. This water heater is being installed because the old one was 10 years old and had multiple parts that needed to be replaced. The old unit had a failed expansion tank causing the tnp to disperse water leading to an excessively high water bill. Upon presenting options The Farley’s opted to replace the old unit entirely. This new unit was installed entirely using double wall venting, all copper water lines and two new shutoff valves installed. Everything was brought up to code upon installation of the new unit.