InterNACHI Water Heater Dating Chart

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# – 1^st 4 digits

1^st 2 digits = year

2^nd2 digits= week

8906xxx= made in the 6^th week of the year 1989

Apollo Comfort Products

Apollo

Bradford-White

BradfordWhite, JetGlas

Serial# – 1^st 2 letters

Crispaire

E-tech

GSW Water Heating

JohnWood, GSW, Moffat, Superflue, Medal

Serial# – 1^st 4 digits

1^st & 2^ndnumber = year,

3^rd& 4^th number = month

8901xxx= made in the year 1989 in the first month, January

Heat Transfer Products

HeatTransfer

Lochinvar

EnergySaver, Golden Knight, Knight

Marathon

Marathon

Serial# – 1^st 4 digits

1^st & 2^nddigit = month,

3^rd& 4^th digit = year

0189xxx= made in the year 1989 in the first month, January

Maytag

Maytag

Manufacturer

Trade Names

Where to Look

How to Decode

Example

Rheem

AquaTherm, General Electric, Hotpoint, Professional, Rheem, Vanguard, WesternAuto

Serial# – 1^st 4 digits

1^st & 2^nddigit = month,

3^rd& 4^th digit = year

0189xxx= made in the year 1989 in the first month, January

Richmond

Richmond

Serial# – 1^st 4 digits

1^st & 2^nddigit = month,

3^rd& 4^th digit = year

0189xxx= made in the year 1989 in the first month, January

Ruud

Professional,Ruud

Serial# – 1^st 4 digits

1^st & 2^nddigit = month,

3^rd& 4^th 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# – 2^nd, 3^rd, 4^th characters

2^nd position(letter) = month (A being January through M being December)

3^rd& 4^th position (numbers) = year

AJ89xxx=  made in October (J) of 1989

State Industries

State

Serial# – 1^st 3 characters

first letter = month (A being January through M, being December), 2^ndand 3^rd position (numbers) = year

J89xxx= made in October of 1989

Summit Manufacturing

Mortex

SunTherm

Manufacturer

Trade Names

Where to Look

How to Decode

Example

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 EnergyConservation Water Heater, The Earl's Energy Saver Plus, Envirotemp, FourMost, 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# – 1^st 4 digits

1^st 2 digits = year

2^nd2 digits= week

8924xxx= made in the 24^th week of the year 1989

Vaugn Manufacturing Corp.

Sepco, Hydrohot, D.W. Whitehead