How to determine the date of production/manufacture or age of a RELIANCE® water heater.
RELIANCE® water heater
This page was last updated 5 July 2012
Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of water heating equipment. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. For this reason if you find during your research that we may have erred please contact us. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. Email us information or pictures of data/nomenclature plates of the unit and we will attempt to assist you in your determinations. Email
The date of production/manufacture or age of a RELIANCE® water heater can be determined from the serial number. Serial number styles/formats found:
Style 1: L92441351
Style 2: C91A136750
Style 3: AJ03123456