Is there a chart for understanding the different serial #s on water heaters to determine the age of manufacture?

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Originally Posted by maycee

Is there a chart for understanding the different serial #s on water heaters to determine the age of manufacture?

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Water Heater Manufacture Dates by Serial Number
Manufacturers Legends
Rheem
Rudd
Richmond (Menards)
GE (Home Depot)
Bangard (W. W. Grangiers Disregard letters at beginning
1st and 2nd numbers = month
3rd and 4th numbers = year
Example: RMNG1199D0743 = November 1999
Example: 0502F0655 May 2002
A. O. Smith
Minnerizer (For Minnegasco until about 2000) First letter = factory
2nd letter = month, A=Jan, M=Dec, etc. letter I is not used
3rd and 4th digits = year
Example: MD98-0048353-P38 = April 1998
State
Kenmore
Reliance
Maytag
Apollo 1st letter = month, A=Jan, M=Dec, etc. letter I is not used
2nd and 3rd digits = year
Example: J01-128999 = September 2001
American
Craftmaster
Whirlpool
Pro Line
Envirotemp (Loews) 1st and 2nd numbers = year
3rd and 4th numbers = week
Example: 040262311 = The week of January 5th, 2004
Lochinvar Same as Bradford White
Bradford White 1st letter = year, letters I, o, q, r, u, v not used
2nd letter = month
Example: TC1234567 = March 1999
A= 1984
B= 1985
C= 1986
D= 1987
E= 1988
F= 1989
G= 1990
H= 1991
J= 1992
K= 1993
L= 1994
M= 1995
N= 1996
P= 1997
S= 1998
T= 1999
W= 2000
X= 2001
Y= 2002
Z= 2003
A= 2004
B= 2005
C= 2006

Hope this answers your question, Tom