The date of manufacture is when a water heater was produced. It helps determine age, remaining lifespan, and warranty eligibility. The date is usually encoded on the serial number tag or data plate and may require the manufacturer’s decoding guide.
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The date of manufacture is when a water heater was produced. It helps determine age, remaining lifespan, and warranty eligibility. The date is usually encoded on the serial number tag or data plate and may require the manufacturer’s decoding guide.
Where do I find the date of manufacture on a water heater?
Look on the serial number tag or data plate; the date is often encoded within the serial number.
Source: The Cooling Company
Serial numbers often include a coded manufacture date.
During a home inspection, the inspector checks the serial number tag to estimate the water heater’s age and plan for replacement.
If the serial number is unclear, use the manufacturer’s lookup tool or contact support for the exact date.
“If the serial number is unclear, use the manufacturer’s lookup tool or contact support for the exact date.”
Many manufacturers updated serial‑number formats to make the build date easier to decode.
Is the date of manufacture the same as the installation date?
No. A unit may be installed weeks or months after it was manufactured.
How long do water heaters typically last?
Many last 8–15 years depending on type, water quality, and maintenance.
Can the serial number help with warranty status?
Yes. Manufacturers often use it to verify age and warranty eligibility.
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