Takagi® Water age

How to determine the date of production/manufacture or age of Takagi^® brand Water Heater Systems.

Water heaters in general have an average estimated useful service life of 10-12 years, though water quality, routine upkeep/maintenance, and location of the water heater will all play critical roles in the longevity of these systems.

Parent Company: AO Smith (North American operations since 2010)

Subsidiaries:

The date of production/manufacture or age of Takagi brand Water Heater equipment can usually be determined from the serial number located on the rating data plate.

Example serial number styles/formats found:

→Style 1: 1544E000453 (AO Smith style)

→Style 2: 1816104327281 (AO Smith style)

→Style 3: 33001941

Legend: Year is RED; Month is GREEN; Week is BLUE

→Style 1: 1514E000453

Year of manufacture can be determined by using the 1^st & 2^nd digits of the serial number

Week of manufacture can be determined by using the 3^rd & 4^th digits of the serial number

Note: This is an AO Smith Style serial number used after 2009

→Style 2: 1816104327281

Year of manufacture can be determined by using the 1^st & 2^nd digits of the serial number

Week of manufacture can be determined by using the 3^rd & 4^th digits of the serial number

Note: This is an AO Smith Style serial number used after 2009

→Style 3: 33001941

This was a sequential serial number style used Prior to 2009

Year of manufacture can only definitively be determined by contacting Takagi directly or estimated using other clues/indications such as ANSI or CSA code revision years listed on the rating plate (see example slide below).

Note: This is style serial number used 2009 and prior (before acquisition of Takagi North American operations in 2010)

Takagi^® History¹

1946 - Takagi Machinery Co. founded
1952 - Takagi Machinery Co., Ltd. established
1962 - Released a bath water boiler with automatic ignition
1968 - Changed company name to Takagi Industrial Co., Ltd.
1980 - Developed the industry's first water heater with proportional control gas valves for remote reheating
1990 - Developed the industry's first water heater with water temperature control function & commercial multi-system water heater
2000 - Started development & sales of a condensing water heater "ECO JOZU" with home heating
2010 - North American operations acquired by A.O. Smith which established a joint venture company "TAKAGI - A.O. Smith Tankless Water Heater Company LLC"

_{¹History excerpts derived from various industry sources and research}

Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of water heating equipment. Users relying on this information do so at their own risk.

Page last updated: 08/08/2024

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