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Determining Water Heater Age

Manufacturer

Trade Names

Where to Look

How to Decode

Example

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

Apollo Comfort Products

Apollo

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)

Crispaire

E-tech

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

Heat Transfer Products

Heat Transfer

Lochinvar

Energy Saver, Golden Knight, Knight

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

Maytag

Maytag

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

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

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

Sears, Roebuck and Co.

Kenmore

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

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

Summit Manufacturing

Mortex

Sun Therm

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

Vaugn Manufacturing Corp.

Sepco, Hydrohot, D.W. Whitehead

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