Determining Water Heater Age
Manufacturer |
Trade Names |
Where to Look |
How to Decode |
Example |
American |
ACE, American, American Hardware, America's Best, Apex, Aqua Temp, AquaTherm, Aquamatic, Best, Best Deluxe, Champion, Craftmaster, De-Limer, Deluxe, Eagle, The Earl's Energy Conservation Water Heater, The Earl's Energy Saver Plus, Envirotemp, Four Most, Hotmaster, Hotstream, King-Kleen, King-Line, Master Plumber, Nationaline, Neptune, Penquin, Premier Plus, Premier Plus Self Cleaning Prestige, ProLine and ProLine Plus, Quaker, Quick-Flo, Raywall, Revere, Riveria, Sands, Sentinal, Servi-Star, Shamrock, Special Deluxe, Standard, Super Eagle, Super-Flo, Supreme, Sure-Fire, Thoro-Clean, Tru-Test, Tru Value, U.S. Supply, Whirlpool, XCL Energy Saver |
Serial # – 1st 4 digits |
1st 2 digits = year
2nd 2 digits= week |
8906xxx = made in the 6th week of the year 1989 |
Apollo Comfort Products |
Apollo |
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Bradford-White |
Bradford White, JetGlas |
Serial # – 1st 2 letters |
1st letter = year starting with A as 1984,
2nd letter = month with January (A) through December (M) |
JMxxx = made in the year 1992 (J) in the month of December (M) |
Crispaire |
E-tech |
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GSW Water Heating |
John Wood, GSW, Moffat, Superflue, Medal |
Serial # – 1st 4 digits |
1st & 2nd number = year,
3rd & 4th number = month |
8901xxx = made in the year 1989 in the first month, January |
Heat Transfer Products |
Heat Transfer |
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Lochinvar |
Energy Saver, Golden Knight, Knight |
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Marathon |
Marathon |
Serial # – 1st 4 digits |
1st & 2nd digit = month,
3rd & 4th digit = year |
0189xxx = made in the year 1989 in the first month, January |
Maytag |
Maytag |
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Rheem |
Aqua Therm, General Electric, Hotpoint, Professional, Rheem, Vanguard, Western Auto |
Serial # – 1st 4 digits |
1st & 2nd digit = month,
3rd & 4th digit = year |
0189xxx = made in the year 1989 in the first month, January |
Richmond |
Richmond |
Serial # – 1st 4 digits |
1st & 2nd digit = month,
3rd & 4th digit = year |
0189xxx = made in the year 1989 in the first month, January |
Ruud |
Professional, Ruud |
Serial # – 1st 4 digits |
1st & 2nd digit = month,
3rd & 4th digit = year |
0189xxx = made in the year 1989 in the first month, January |
Sears, Roebuck and Co. |
Kenmore |
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A.O. Smith Water Products |
National, A.O. Smith, Glascote, Perma-Glas |
Serial # – 2nd, 3rd, 4th characters |
2nd position (letter) = month (A being January through M being December)
3rd & 4th position (numbers) = year |
AJ89xxx = made in October (J) of 1989 |
State Industries |
State |
Serial # – 1st 3 characters |
first letter = month (A being January through M, being December), 2nd and 3rd position (numbers) = year |
J89xxx = made in October of 1989 |
Summit Manufacturing
Mortex |
Sun Therm |
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U.S. Craftsmaster
Water Heaters |
Ace, American Hardware, America's Best, Apex, Aqua Temp, Aqua Therm, Aquamatic, Best, Best Deluxe, Craftmaster, De-Limer, Deluxe, Eagle, The Earl's Energy Conservation Water Heater, The Earl's Energy Saver Plus, Envirotemp, Four Most, Hotmaster, Hotstream, King-Kleen, King-Line, Master Plumber, Nationaline, Neptune, Penquin, Prestige, Pro-Line, Pro-Line Plus, Quaker, Quick-Flo, Raywall, Revere, Riviera, Sands, Sentinal, Servistar, Shamrock, Special Deluxe, Standard, Supereagle, Super-Flo, Supreme, Sure-Fire, Thoro-Clean, True-Test, Tru Value, U.S. Craftmaster, U.S. Supply, Whirlpool, XCL Energy Saver |
Serial # – 1st 4 digits |
1st 2 digits = year
2nd 2 digits= week |
8924xxx = made in the 24th week of the year 1989 |
Vaugn Manufacturing Corp. |
Sepco, Hydrohot, D.W. Whitehead |
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