Reliance Water Heater Age Lookup
Reliance covers gas, electric, and power-vent water heaters, each with a date code in the serial number. Enter yours to reveal the exact build date and how old your Reliance unit is. No account needed.
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Finding Your Reliance Serial Number
Check these four spots on your Reliance water heater
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try removing access panels or checking behind the temperature dial.
Reliance Serial Number Examples
Don't worry if yours looks different - Reliance has multiple formats and our system can decode most variations.
About Reliance Water Heaters
Reliance water heaters have served American homeowners for over six decades, establishing a presence in the value-oriented segment of the residential water heating market. The brand operates under the A.O. Smith Corporation umbrella while maintaining its distinct identity and product positioning. Reliance focuses on delivering essential water heating performance with dependable construction at accessible price points, making their products popular choices for rental properties, budget-conscious homeowners, and straightforward replacement scenarios. The brand is distributed primarily through home improvement retailers and select independent dealers, providing convenient availability for consumers and contractors alike.
Reliance manufactures traditional gas and electric water heaters in standard residential capacities from 30 to 50 gallons, covering the needs of most typical households. Their gas models feature reliable pilot systems or electronic ignition depending on the specific series, along with industry-standard safety controls and temperature regulation. Electric units incorporate quality heating elements and thermostats designed for consistent operation. The tanks feature glass lining with protective anode rods to resist corrosion and extend service life. While Reliance water heaters emphasize fundamental functionality rather than advanced features, they incorporate the essential components needed for reliable hot water delivery and meet applicable energy efficiency regulations.
Reliance water heaters come with warranty coverage appropriate to their market positioning, typically offering 6-year protection on tanks and components for residential installations. Service support is available through retail channels where the products are sold, as well as independent plumbing contractors familiar with standard water heater service procedures. Replacement parts can be sourced through appliance parts suppliers and in some cases directly through retailers. Installation requirements follow industry standards, and basic troubleshooting guidance is provided in owner documentation. Reliance serial numbers use consistent formatting that incorporates manufacturing date information, helping service professionals determine unit age when assessing whether repair or replacement represents the most economical choice for customers.
Where to find the serial
Reliance water heaters are part of the A.O. Smith family and sold heavily at Lowe's, Menards, and through plumbing wholesalers. The rating plate is on the upper third of the tank, and the serial uses the standard A.O. Smith YYWW format.
What the serial actually looks like
Why the age is worth knowing
Reliance residential tanks carry 6, 9, or 12-year tank warranties depending on the line. Reliance is positioned as the value brand in the A.O. Smith family, and the 6-year units are the most common in service today. After year 8-10 these typically need replacement, often because the dip tube or anode rod has failed.
Quick answers for this brand
Is Reliance the same as A.O. Smith?
Reliance is one of the brands under the A.O. Smith Corporation umbrella, sharing manufacturing plants and the same component suppliers. The Reliance brand specifically targets value and big-box channels, while A.O. Smith branded units are sold through plumbing wholesalers. Tank construction and serial format are identical.
Where are Reliance water heaters made?
Reliance tanks come from the A.O. Smith plants in Ashland City, Tennessee and McBee, South Carolina, depending on the model. Both plants run the same lines that produce A.O. Smith, State, American, and several house brands. The serial encoding is consistent across all of them.
Why does my Reliance say 6-year warranty but the tank is leaking after 7?
The 6-year warranty is the manufacturer's coverage on the steel tank against corrosion failures. Once it expires, you're on your own. Replacement is almost always more economical than tank repair - the labor to drain, disconnect, and re-pipe is the same whether the tank is 1 day or 10 years old, so a fresh unit makes sense.
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