How do I find the age of an American water heater from the serial number?

Saturday, February 13, 2021

The first two numbers of the serial number are the year of manufacture for water heaters made by American Water Heater Company. So the data plate shown below indicates 2004. 

    American manufactures several different brands of its own, such as Proline and Craftmaster, along with others for companies and retailers like Whirlpool and Ace Hardware. Many have been discontinued for years, but a few older water heaters with these nameplates may still be around. If you look carefully at the bottom of the data plate, you will see the name of the actual manufacturer in fine print. This is important to look for, because some retailers have switched manufacturers for their brand over the years. Here’s a list:
Ace water heaters
American Hardware water heaters
Apex water heaters
Aquamatic water heaters
Aqua Temp water heaters
Aqua Therm water heaters
Best or Best Deluxe water heaters
Champion water heaters
Deluxe water heaters
Eagle water heaters
Earl’s Energy Saver water heaters
 Envi-Ro-Temp water heaters
Hotmaster water heaters
Hotstream water heaters
King-Cleen water heaters
King-Line water heaters
Master Plumber water heaters
Nationaline water heaters
Neptune water heaters
Penguin water heaters
Premier water heaters
Quaker water heaters
Quick-Flo water heaters
Revere water heaters
Riviera water heaters
Sands water heaters
Sentinel water heaters
Service-Star water heaters
Shamrock water heaters
Special Deluxe water heaters
Standard water heaters
Super Eagle water heaters
Sure-Fire water heaters
Thoro-Clean water heaters
Tru-Test water heaters
Tru-Value water heaters
U.S. Supply water heaters

    To determine the age of another manufacturer/brand of water heater, go to How do I determine the age of my water heater?

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Here’s links to a collection of more blog posts about WATER HEATERS:

Are water heaters required to be raised off the floor? 

Can a Temperature and Pressure Relief (TPR or T&P) valve be mounted to discharge horizontally?

Where are gas water heaters not allowed to be installed?  

Is the minimum size water heater inlet pipe 1/2" or 3/4" according to the building code? 

Can you use a light switch for a water heater disconnect? 

How can I tell if a water heater is HUD-approved for mobile/manufactured homes?

Can you wire a 240-volt water heater with 120 volts? 

Is it alright to have a shut-off valve on both the hot and cold water pipes at a water heater?  

What is the minimum clearance to doors and windows for an outdoor tankless gas water heater? 

What is required clearance for access and working space in front of an electric water heater? 

Why is the water heater older than the house? 

Does a water heater need a shut-off valve? 

Why should a tankless water heater have an isolator/service valve kit installed?

When was a gas water heater first required to be elevated 18 inches above a garage floor?  

Can the temperature and pressure relief (TPR) valve discharge pipe for a mobile/manufactured home water heater terminate under the home? 

What is the purpose of a thermostatic mixing valve above a water heater? 

Does a tankless gas water heater still work with no electricity during a power outage?  

•  Why do water heaters have a sacrificial anode? 

What is the difference between a manufactured/mobile home water heater and a regular water heater? 

Does a tankless water heater require a pressure relief valve?

When is a water heater drain pan required?

Why is there water in my water heater drain pan?

What does it mean when a water heater Temperature/Pressure Relief (TPR) discharge pipe is "trapped"? 

Can I leave a gas water heater in place when remodeling a garage into a family room or bedroom? 

Where do I find the water heater in a mobile home?

Does a tankless water heater in an attic require a drain pan? 

Does an electric water heater require a disconnect? 

Is a catch pan and drain piping required for a replacement water heater?

What is the difference between a single element and dual element electric water heater? 

What is an FVIR water heater?

What is a heat pump water heater?

What is a dielectric union?

What's that powdery crust on the pipe connections at the water heater? 

What are the most common installation mistakes with water heater replacement?

Why is my water heater making strange (rumbling, gurgling, knocking or banging) noises? 

What can I do to make my water heater last longer?

How can I determine the age of a water heater if the serial number is missing or decoding it is impossible? 

How does a hydronic heating system work?

What is the difference between a regular water heater and a direct vent water heater? 

What is the difference between a regular water heater and a power vent water heater?

What is backdrafting at a gas water heater? 

How do I determine if a water heater is gas or electric?

What does it mean when a gas appliance (water heater, furnace, or range) has been "red tagged"?  

• What's the valve with the flip-up handle on the water heater for?

• Why is an older water heater an insurance problem?

   Visit our WATER HEATERS page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles. 

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