How to determine Water Heater Age

It is hard to find the date of manufacture of Hot Water Tank, or Water Heater. Most of time they do not put the date on the plate.
But we can decode from the serial number. Let me show you how to determine the age of Hot Water Tank of different brand.

 

Manufacturer

Trade Names

Where to Look

How to Decode

Example

AmericanACE, 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 SaverSerial # – 1st 4 digits1st 2 digits = year

2nd 2 digits= week

8906xxx = made in the 6th week of the year 1989
Apollo Comfort ProductsApollo
Bradford-WhiteBradford White, JetGlasSerial # – 1st 2 letters1st 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)
CrispaireE-tech
GSW Water HeatingJohn Wood, GSW, Moffat, Superflue, MedalSerial # – 1st 4 digits1st & 2nd number = year,

3rd & 4th number = month

8901xxx = made in the year 1989 in the first month, January
Heat Transfer ProductsHeat Transfer
LochinvarEnergy Saver, Golden Knight, Knight
MarathonMarathonSerial # – 1st 4 digits1st & 2nd digit = month,

3rd & 4th digit = year

0189xxx = made in the year 1989 in the first month, January
MaytagMaytag
RheemAqua Therm, General Electric, Hotpoint, Professional, Rheem, Vanguard, Western AutoSerial # – 1st 4 digits1st & 2nd digit = month,

3rd & 4th digit = year

0189xxx = made in the year 1989 in the first month, January
RichmondRichmondSerial # – 1st 4 digits1st & 2nd digit = month,

3rd & 4th digit = year

0189xxx = made in the year 1989 in the first month, January
RuudProfessional, RuudSerial # – 1st 4 digits1st & 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 ProductsNational, A.O. Smith, Glascote, Perma-GlasSerial # – 2nd, 3rd, 4th characters2nd position (letter) = month (A being January through M being December)

3rd & 4th position (numbers) = year

AJ89xxx = made in October (J) of 1989
State IndustriesStateSerial # – 1st 3 charactersfirst letter = month (A being January through M, being December), 2nd and 3rd position (numbers) = yearJ89xxx = 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 SaverSerial # – 1st 4 digits1st 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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6 Comments

  1. These water tanks can really help people save energy and money. The technology of today allows for ways to minimize cost and expenses, and that is a great deal. People look for practicality, nowadays.

  2. These water tanks can really help people save energy and money. The technology of today allows for ways to minimize cost and expenses, and that is a great deal. People look for practicality, nowadays.

  3. Most water tanks may work for a long time so it is important to keep track of how long one has been working. It is also beneficial to maintain their longevity by taking care of their parts, thus avoiding frequent repairs and replacements.

  4. Most water tanks may work for a long time so it is important to keep track of how long one has been working. It is also beneficial to maintain their longevity by taking care of their parts, thus avoiding frequent repairs and replacements.

  5. Replace your current storage tank water heater with another exactly the same. Today, there are a lot of new options to consider as you seek to improve energy efficiency and the green living profile of your home.

  6. Replace your current storage tank water heater with another exactly the same. Today, there are a lot of new options to consider as you seek to improve energy efficiency and the green living profile of your home.

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