[maycee]

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

[speedball1]

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

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