Cobb County Expansion Tank Requirements

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Cobb County has joined the ranks of many other Metro-Atlanta water companies by improving the infrastructure of our water systems. Many Cobb residents have been receiving letters from Cobb County Water Department informing them that they will be installing new backflow prevention devices in their area. The letter further recommends that all residents bring their homes up to present code by installing a thermal expansion device to create a closed system. The thermal expansion tank is a simple and efficient method to ensure that your system is safe.

What is Thermal Expansion?

Thermal expansion refers to the characteristics of water to expand when heated and to contract when cooled. Unlike air, which can be compressed, water grows in volume and must be accommodated when heated.

Why is Thermal Expansion occurring?

In a water heater, thermal expansion can create more pressure than the system can handle. When unchecked, this pressure can result in expensive leaks, as well as damage to the water heater, pipes, or other plumbing fixtures.

When is a Thermal Expansion device necessary?

  • A recent water meter replacement
  • A water heater replacement
  • The construction of a new home

Still have questions? Contact one of our friendly office staff and we will be glad to assist you in determining if you need to install or replace your existing thermal expansion tank.

If you need to get your water heater up to code, call our team at 770-268-2331 or just book online.

My Georgia Plumber serviced water heaters in and around Acworth, Alpharetta, Ball Ground, Canton, Cumming, Kennesaw, Johns Creek, Marietta, Roswell, Sandy Springs, Smyrna, Suwanee, and Woodstock for over 30 years. We have a plumber near your home in North Georgia.

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By pressing Submit I agree to receive phone, email, or text messages from My Georgia Plumber to the provided mobile number and also agree to the My Georgia Plumber terms and privacy policy. Message & data rates may apply. Consent is not a condition of purchase. We will never share your personal information with third parties for marketing purposes.
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