How Long Do Water Heaters Last in Marietta, GA?

The honest numbers

In Marietta, a tank water heater typically runs 8 to 12 years. With a yearly flush and an anode swap on schedule, you can stretch one to 14. Skip maintenance and you are looking at 6 to 8 before the floor pits. Tankless units run 18 to 22 years if you descale on time.

Why local water matters

Cobb County tap from the Quarles and Hyde Farm plants on Lake Allatoona runs about 3 to 5 grains per gallon, which is mild. Mild does not mean harmless. Every cycle drops a thin layer of calcium on the burner plate and chews a little anode rod. Once the rod is gone, the steel inside the tank starts pitting. Older homes around the Marietta Square with galvanized risers feed extra junk into the tank, which speeds it up.

Signs your unit is near the end

• Tank is 10+ years old (check the serial number for the build date)
• Hot water comes out rusty at the tap
• Loud pops or rumbles when the burner fires
• Hot showers run out twice as fast as they used to
• Rust streaks or a wet ring around the base
• Pilot light keeps blowing out

How to stretch the lifespan

Two yearly tasks do most of the work: a full flush and an anode rod check. The anode is a $40 part designed to corrode in place of your tank. Pull it every two years and swap it when 75 percent gone. Cobb County water buys you that. Also confirm the install has an expansion tank and a drip pan, both required by Georgia code, so a small leak does not turn into a flooded den.