American Standard Water Heater Age Lookup
American Standard water heaters - a licensed brand now run by a division of Ariston Group - stamp a date code right into the serial number. Type yours in and you'll see the exact manufacturing month and year, plus where it stands on warranty. It's free and takes about ten seconds.
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Finding Your American Standard Serial Number
Check these four spots on your American Standard 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.
American Standard Serial Number Examples
Don't worry if yours looks different - American Standard has multiple formats and our system can decode most variations.
About American Standard Water Heaters
The American Standard name on a water heater is a license. These units are built and sold by a division of Ariston Group, the Italian water heating manufacturer, not by the fixture company whose name is on the faucet. That single fact answers most parts and warranty questions, because Ariston handles both.
The range is conventional gas and electric tanks in residential and light commercial sizes, glass lined with anode rods, in atmospheric and power vent configurations, plus hybrid heat pump models. Warranty length is usually written into the model number, where a trailing 6 or 12 gives the tank coverage in years.
The serial is not a year and week code, which is the most common mistake made with these units. On everything except the hybrid heat pumps, it opens with a letter giving the month, followed by the two digit year and then the sequence, so G18-1234 is July 2018. Hybrid heat pump units use a much longer 21 digit format instead. Reading an American Standard serial as year and week returns nothing, or worse, a date that looks reasonable and is wrong.
Where to find the serial
American Standard water heaters carry the rating plate on the upper third of the tank, labeled SER NO. The water heater line is a licensed brand currently run by a division of Ariston Group - it is not connected to the plumbing fixture company and is not built by A.O. Smith or Rheem. The serial has its own distinctive format: a letter, two digits, then a hyphen and a sequence number.
What the serial actually looks like
Why the age is worth knowing
American Standard tank warranties come in 6 and 12-year tiers, and the tier is encoded as a trailing 6 or 12 in the model number. Service life follows standard residential expectations (10-12 years) and the most common failures are anode rod depletion leading to tank corrosion. Watch for rusty hot water after year 7 as the first warning sign.
Quick answers for this brand
Are American Standard water heaters and American Standard plumbing fixtures the same company?
No. The water heater line is a brand license held by a division of Ariston Group, unrelated to the fixture company. The heaters have their own serial format and warranty structure, so don't assume anything carries over from the fixture brand.
Where can I buy American Standard water heaters?
American Standard water heaters are sold through plumbing wholesale distributors and some regional retailers. They're not as widely available as Rheem or A.O. Smith branded units.
How do American Standard warranties work?
The tank warranty is 6 or 12 years depending on the model - the trailing 6 or 12 in the model number tells you which tier you have. Coverage starts at the date of installation (with receipt) or defaults to the manufacture date encoded in the serial. Decoding the serial gives you the worst-case warranty start date.
Time to repair or replace your water heater?
Compare free quotes from top-rated local pros near you.
Protect your water heater and 20+ home systems with a home warranty
Share this tool with friends!
Know someone with an aging water heater? Send them a free check.