HGTVRe.s demonstrates the advantages of a tankless water heater..Tankless water heaters also feature a compact,e saving, wall mounted design. Although the initial cost of a tankless water heater installation is greater than installation of a water heater tank, lower operating and energy costs are likely to offset the higher purchase price..HomeAdvisor’s Tankless Water Heater Cost Guide gives the average prices for electric and gas systems, installation, replacement, and maintenance as well as cost .Install a Gas Supply Line for the Tankless Water Heater Install a T and valve in the existing gas line and run a new corrugated stainless steel supply line for the tankless water heater. Building codes in many communities permit its use rather than conventional black iron for gas lines..
Remove the old water heater. Turn off the water, gas supply valves and power. Install a new gas line. Install a tee and valve in the existing gas line if needed. Install new water lines. Mount the water heater. Connect the water heater. Install the vent. Turn on the water heater. Plug in the water heater..