There are a number of factors that play a part in the cost of installing a new water heater. Tank vs. Tankless. Average cost with installation Tank $. gallon tank Tankless $,. Water heaters come in two different styles tank and tankless. Both heat your water, but they do it in different ways..Close all exterior doors and windows and turn on your kitchen and bathroom exhaust fans. Then open a nearby water faucet until you hear the gas burner in the water heater ignite. After a minute, move a sm.ng match around the edge of the draft hood P.o on top of the heater. The smoke should be drawn up the vent pipe..Install a new gas water heater to save money on your utility bills. Our and step by step guide shows you how.. Turn off the water and gas supply. Attach a garden hose to the drain valve and empty the tank. Turn on a water faucet to allow air into the system..
Here s what you need to know to install a gas water heater. projects repair and .