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Check Age on Rheem or A.O. Smith Heaters — Determine Your Water Heater's Age

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Hot Water Heater Lifespan: When to Replace Your Water Heater · Step 1 of 3

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For Rheem and A.O. Smith water heaters, the process is straightforward. Look on the manufacturer's label for the 'MFG. DATE' or 'Manufacturing Date'. The month and year of production will be clearly printed next to it.

Goal: Find the printed manufacturing date

  • These brands make it very easy to identify the age without needing to decode a serial number.
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Matt Risinger

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FAQs

What essential tools or equipment do I need to inspect my hot water heater for replacement?

You'll primarily need a flashlight to illuminate hard-to-reach areas and inspect the tank thoroughly. A camera on your phone can also be helpful for documenting issues or getting a better view of cramped spaces. No specialized tools are required for this assessment.

What are the most critical safety precautions to take during the water heater inspection?

Always be mindful of hot pipes and electrical connections. If your water heater is gas-powered and you detect any gas smell (rotten eggs), immediately leave the area, do not operate switches, and contact your gas utility. Avoid touching severely corroded or leaking areas with bare hands.

How can I accurately determine my water heater's age if the label or sticker is missing or unreadable?

The manufacturing date is usually encoded in the serial number, often using a letter for the month and two digits for the year (e.g., F10 for June 2010). You can typically find a deciphering guide on the manufacturer's website or by searching online with your brand and serial number format.

Besides active leaks, what less obvious signs of wear and tear should I look for that indicate my water heater might need replacement?

Look for dried water streaks, discoloration, or corrosion around fittings, the pressure relief valve, and the bottom of the tank, which could signal past or intermittent leaks. Also, listen for persistent popping, rumbling, or banging noises, often indicating significant sediment buildup.

Transcript
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Ailsmith. Green and Ailsmith make it very easy for you to check the age. You're going to look for the label in front of the water heater, and on that label you'll see the manufacturing date.

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