PDF《How to Determine Water Heater Age》

How to Determine Water Heater Age Maintained by send suggestions to scott@HonestHomeInspections.

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1 Water Heaters: SECOND LETTER C MONTH OF MANUFACTURE A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K = October, L = November, M = December (Most manufactures that use letters follow this letter to month pattern) Ambassador C See State American- 1st two digits equal the year, next two the week. ACE C See American or State AO Smith- Can be confusing;

digits may be comprised of letters &

numbers. May be one, two, or no letters. If two letters first, next two numbers are year. If one letter first, followed by two numbers and another letter, next two numbers are year. If one letter first, next two numbers are year, providing no letter follows. If two numbers first, this is year. Typically the 2nd letter (sometimes first i.e. Kenmore and GSW) equals the month and the next two digits are the year. Apollo C See AO Smith AquaTemp C See American AquaTherm- See American Best CSee American Bosch - The first three digits of the serial number indicate the production date Month \ Year

1998 1999

2000 2001

2002 2003

2004 2005

2006 2007

2008 2009 January

861 961

081 181

281 381

481 581

681 781

881 981 February

862 962

082 182

282 382

482 582

682 782

882 982 March

863 963

083 183

283 383

483 583

683 783

883 983 April

864 964

084 184

284 384

484 584

684 784

884 984 May

865 965

085 185

285 385

485 585

685 785

885 985 June

866 966

086 186

286 386

486 586

686 786

886 986 July

867 967

087 187

287 387

487 587

687 787

887 987 August

868 968

088 188

288 388

488 588

688 788

888 988 September

869 969

089 189

289 389

489 589

689 789

889 989 October

870 970

090 190

290 390

490 590

690 790

890 990 November

871 971

091 191

291 391

491 591

691 791

891 991 December

872 972

092 192

292 392

492 592

692 792

892 992 Bradford-White- 1st letter in the S/N is the year of manufacturer with A being 1964,

1984 or

2004 (They use a

20 year cycle) They skip the letters I, O, Q, R, U, V to make the full cycle. The second letter is the month A=January through M = December (I is left out) FIRST LETTER C YEAR OF MANUFACTURE A =

2004 F =

1989 L =

1994 T =

1999 B =

2005 G =

1990 M =

1995 W =

2000 C =

1986 H =

1991 N =

1996 X =

2001 D =

1987 J =

1992 P =

1997 Y =

2002 E =

1988 K =

1993 S =

1998 Z =

2003 C=2006 D=2007: E=2008 F =

2009 Cafos C Japanese brand of water heater How to Determine Water Heater Age Maintained by send suggestions to scott@HonestHomeInspections.com Page

2 Champion C See American Craftmaster C See American Crosley: (yes they are still making them) See Reliance or State Energy saver C See Bradford White Envirotemp C See American GE-1st two digits equal the month, next to the year. (mfg by Rheem) Glascote CSee AO Smith Golden Knight C See Bradford White GSW C See AO Smith Hotpoint C see GE? JC Penney C See State Jetglas C See Bradford White JW or John Wood C See AO Smith Kenmore: See State, was AO Smith at one time Lochinvar C See Bradford White Lowes C See Rheem Mainstream C unknown at this time Maytag C See AO Smith Montgomery Ward C See Rheem Mor-Flo - American Knight C See Lochnivar PermaGlas C See AO Smith Reliance C See State Revere C See American Rheem/Rudd/Richmond- 1st two digits equal the month, next to the year. Rheem Manufacturing is owned by Japanese water heater manufacturer Paloma Rinnai - Rinnai America Corp http://www.foreverhotwater.com/index.php. The manufacturing date code is the first four digits of the serial number, written as YYMM, Security C See US Water Heater Shamrock C See American Standard C See American State/Reliance/Sears- Letter that equals the month followed by the year. (made by AO Smith) Takagi - ? Thermo-King C See State Industries Vanguard C See Rheem US Craftmaster C See American US Water Heater - ???? Whirlpool - See American The only real manufactures of water heaters anymore are American, AO Smith, Bradford White, and Rheem. It is rumored that we are now getting Japanese and Chinese water heaters in the market (3/08) How to Determine Water Heater Age Maintained by send suggestions to scott@HonestHomeInspections.com Page