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Determining Water Heater Age
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Manufacturer
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Trade Names
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Where to Look
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How to Decode
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Example
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American
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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
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Serial # – 1st 4 digits
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1st 2 digits = year
2nd 2 digits= week
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8906xxx = made in the 6th week of the year 1989
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Apollo Comfort Products
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Apollo
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Bradford-White
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Bradford White, JetGlas
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Serial # – 1st 2 letters
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1st letter = year starting with A as 1984,
2nd letter = month with January (A) through December (M)
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JMxxx = made in the year 1992 (J) in the month of December (M)
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Crispaire
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E-tech
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GSW Water Heating
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John Wood, GSW, Moffat, Superflue, Medal
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Serial # – 1st 4 digits
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1st & 2nd number = year,
3rd & 4th number = month
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8901xxx = made in the year 1989 in the first month, January
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Heat Transfer Products
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Heat Transfer
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Lochinvar
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Energy Saver, Golden Knight, Knight
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Marathon
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Marathon
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Serial # – 1st 4 digits
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1st & 2nd digit = month,
3rd & 4th digit = year
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0189xxx = made in the year 1989 in the first month, January
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Maytag
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Maytag
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Rheem
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Aqua Therm, General Electric, Hotpoint, Professional, Rheem, Vanguard, Western Auto
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Serial # – 1st 4 digits
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1st & 2nd digit = month,
3rd & 4th digit = year
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0189xxx = made in the year 1989 in the first month, January
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Richmond
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Richmond
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Serial # – 1st 4 digits
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1st & 2nd digit = month,
3rd & 4th digit = year
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0189xxx = made in the year 1989 in the first month, January
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Ruud
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Professional, Ruud
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Serial # – 1st 4 digits
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1st & 2nd digit = month,
3rd & 4th digit = year
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0189xxx = made in the year 1989 in the first month, January
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Sears, Roebuck and Co.
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Kenmore
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A.O. Smith Water Products
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National, A.O. Smith, Glascote, Perma-Glas
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Serial # – 2nd, 3rd, 4th characters
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2nd position (letter) = month (A being January through M being December)
3rd & 4th position (numbers) = year
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AJ89xxx = made in October (J) of 1989
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State Industries
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State
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Serial # – 1st 3 characters
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first letter = month (A being January through M, being December), 2nd and 3rd position (numbers) = year
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J89xxx = made in October of 1989
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Summit Manufacturing
Mortex
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Sun Therm
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U.S. Craftsmaster
Water Heaters
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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
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Serial # – 1st 4 digits
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1st 2 digits = year
2nd 2 digits= week
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8924xxx = made in the 24th week of the year 1989
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Vaugn Manufacturing Corp.
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Sepco, Hydrohot, D.W. Whitehead
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