Rheem Performance Plus Tall High Efficiency Natural Gas Water Heater offers gradual heating and supports energy conservation..How much replacing a water heater should cost. Average costs and comments from CostHelper’s team of professional journalists and community of users. With all needed .Gas water heater troubleshooting will help you quickly locate and repair the problem you are having with your gas water heater..Think About Replacement Now. If you’re like most people, you’re unlikely to go out lo.ng for a water heater until your existing one fails..
JUMP TO STEPS. Drain the tank. Disconnect the gas line and water lines. Detach the gas exhaust from the flue hat. Set the new water heater in place. Install the heat trap fittings. Install water line connections. Connect the gas supply line. Test the gas line for leaks..