Water Heater Serial Number Decoder Chart
Water Heater Serial Number Decoder
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Manufacturer |
Brand |
Serial # Ex. |
Key |
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American (Prior to 2001, American was owned by GSW Corporation and manufactured water heaters for nearly 50 different brands. American was acquired by A.O. Smith in 2001 and currently only manufactures American, American-Pro-line, Premium Plus, U.S. Craftmaster and Whirlpool brand water heaters.)
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American |
9746****** (46th week of 1997)
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American uses a 2-digit year followed by a 2-digit week
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Craftmaster |
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Mor-Flo/American |
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SABH (U.S.) |
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U.S. Craftmaster |
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Ace |
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American Hardware |
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Best |
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Best Deluxe |
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Apex |
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Aqua Temp |
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Agua Therm |
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Aquamatic |
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Champion |
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De-Limier |
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Deluxe |
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Eagle |
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Earl’s Energy Saver |
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Environtemp |
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Four Most |
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Hotmaster |
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Hotstream |
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King-Cleen |
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King-line |
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Master Plumber |
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Nationaline |
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Neptune |
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Penquin |
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Premier |
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Prestige |
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Proline |
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Proline-Plus |
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Quaker |
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Quick-Flo |
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Raywall |
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Revere |
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Riveria |
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Sands |
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Sentinel |
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Service-Star |
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Shamrock |
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Special Deluxe |
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Standard |
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Super Eagle |
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Sure-Fire |
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Thoro-clean |
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Tru-Test |
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Tru Value |
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U.S. Supply |
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Whirlpool |
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XCL-Energy Saver |
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Manufacturer |
Brand |
Serial # Ex. |
Key |
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A.O. Smith |
A.O. Smith |
Old is *H06****** (August 2006). Since about 2008 0805XXXXXXX |
2nd letter is the month followed by the 2-digit year. A thru N = Jan thru Dec (excludes I) Since 2008, see rules for State below |
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Glascote |
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PermaGlas |
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Bradford-White |
Bradford White |
D*******F (June 1967)
CJ******* (Sept 1986) |
B-W uses a 20-year letter code cycle to designate the year.
The first letter is the year and the second is the month.
Letter A = 1964, 1984 and 2004 A thru N = Jan thru Dec (Excludes I, O, Q, R, U & V) |
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Jetglas |
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Lochinvar |
Lochinvar |
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Energy Saver |
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Golden Knight |
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Knight |
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Rheem |
Rheem |
0794****** (July 1994)
or
0794F***** (July 1994) |
Rheem uses a 2-digit month followed by a 2-digit year |
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Ruud |
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Rheem/Ruud |
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Richmond |
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Vista Therm |
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Citation |
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Aqua Therm |
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Energy Master |
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Vanguard |
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Cimarrom |
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Coast to Coast |
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Lowe’s |
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Servi-Star |
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True Value |
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ABS |
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Intertherm & Miller |
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Mainstream |
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Montgomery Ward |
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General Electric |
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Professional |
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State Industries (State industries was acquired by A.O. Smith in 2008. A.O. Smith now uses this code.)
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State/Kenmore |
0904******* (April 2009)
C05******* (March 2005)
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Beginning 2008, state uses an 11-digit alpha-numeric serial number. The first two positions are the year followed by a two digit month. Position 5 is a letter followed by 6 numbers.
Prior to 2008, state used a 1-letter month followed by a 2-digit year A thru N = Jan thru Dec (Excludes the letter I)
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Reliance |
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Ace |
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Ambassador |
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Barnett |
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Century |
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Crosley |
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Energy Stretcher |
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Freedom |
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Freedome/Nipsco |
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Hardware House |
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Master Plumber/True5 |
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Mission |
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Nationaline |
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Patriot |
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Penfield |
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President |
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Regency |
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Century |
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The Plumbery |
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Thermo-King |
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TopLine |
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