Tankless Water Heater in Mableton, GA

Who issues the permit in Mableton now?

The City of Mableton Building Division. Mableton became a city after a 2022 referendum and now issues its own plumbing permits, which cover water, sewer and gas line installations or repairs, plus electrical and mechanical permits. Applications are accepted only through the Cloudpermit portal. The Building Division is at 6116 Mableton Parkway, Suite 144. A tankless conversion involves gas piping, venting and water connections, so it should be permitted.

Which gas utility serves my Mableton home?

Check your gas bill. The Austell Gas System, run by the City of Austell, lists Mableton in its service area, while other Mableton addresses are on Atlanta Gas Light pipes. That matters for a tankless install because a larger meter is arranged through whichever utility owns it, and leaks go to that utility too. For any gas smell, leave the house first and call 911. Then call Atlanta Gas Light at 877.427.4321, or the Austell Gas System at 770-948-1841, option 1, if your bill shows Austell Gas.

Will my house need much work?

Mableton mixes older rail-era streets along Veterans Memorial Highway with newer subdivisions. The median build year is 1988, and about 35% of homes predate 1980. In a 1960s or 1970s ranch, the heater often sits in a closet beside the furnace, with gas pipe sized for those two appliances; a tankless unit usually needs a larger gas line and a new sealed vent to an outside wall. Newer homes tend to have garage walls that make the job simpler.

Cobb County Water System supplies the city with Chattahoochee River and Lake Allatoona water treated by the Cobb County-Marietta Water Authority and disinfected with free chlorine. No hardness figure is published, so test before deciding on a flush schedule.

One more local note

Mableton's permit system is new, so allow a little time for the online application before the work date. If your current tank still works, that lead time is easy to absorb. If it has already failed, ask the plumber whether a temporary fix can restore hot water while the permit is processed. Homes in the newer subdivisions off the East-West Connector often have large plans where recirculation is worth discussing too.