Step 2 · Identify and Record the Serial Number
Once you've found the data plate, scan the text for the serial number. It will be clearly labeled, typically as 'Serial No.', 'S/N', or 'Ser. No.'. It's a long string of letters and numbers. The best practice is to use your smartphone to take a clear, well-lit photograph of the entire label. This ensures you capture it accurately and can refer to it later without having to go back to the water heater. Make sure the photo is not blurry and the numbers are legible.