Start an Eternal assessment with the existing model
Eternal equipment includes gas hybrid water heaters, which should not be treated as identical to a current tankless model. R.S. Andrews names Eternal in its published plumbing-brand list. Begin with the full model number, installation arrangement and service records so the correct equipment can be assessed.
When an older system develops a fault, correct documentation and component availability need to be checked before choosing repair. Describe the symptom and any displayed code. This page does not promise that a replacement part or a new Eternal unit is available.
Before choosing a replacement
If repair is impractical, compare currently available tankless and conventional replacement options using your home’s utilities and hot-water demand. A different brand may have a different installation scope. Ask what changes the replacement would require and what existing components can be retained.
Plan service around your home.
For a Marietta home with the heater in a basement, garage or utility closet, tell the team about the location and any restricted access. Mention stairs or a narrow removal route when discussing replacement. The installation area can affect the work as well as the choice of equipment.
Compare output at the required temperature rise, simultaneous fixture use and available utility capacity. On-demand heating does not guarantee unlimited flow or immediate hot water at a distant faucet. Learn about repair, replacement and maintenance before you call.
Describe what you can see safely. Leave gas, electrical, venting and pressure-relief work to qualified professionals.