Install two new 50 gallon natural gas water heaters with new ball valves drip pans, and thermal expansion tanks. Both heaters are piped in parallel and meet local code requirements. Both heaters have been equipped with extra anode rods to extend warranties. Technician also installed a new comfort pump on water heater that will save water and customer will also get hot water to fixtures quicker. In addition technician also reworked plumbing in crawl space so the pipes that were once hanging are now strapped and properly insulated. Technician also installed two new hose bibs with their own designated ball valves. After all work was performed technician then restored water back to the home, checked for leaks and found none. Technician also isolated, remodeled guest bathroom, shower due to the fixture, creating a cross connection between hot and cold lines, in which the whole house was experiencing sudden cold to hot fluctuations. Advised customer of this issue.