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Determining Water Heater Age
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Manufacturer |
Trade Names |
Where to Look |
How to Decode |
Example |
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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 |
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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) |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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Vaugn Manufacturing
Corp. |
Sepco, Hydrohot,
D.W. Whitehead |
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