Takagi Water Heater Age by Serial Number
Decode your Takagi serial number to find the manufacturing date, age, and full specs. Free and instant — no account needed.
Takagi Water Heater Age & Model Info
Brand: Takagi (pre-selected)
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Finding Your Takagi Serial Number
Check these four spots on your Takagi water heater
Common Locations
What to Look For
- White or metallic manufacturer sticker
- Labeled "Serial No." or "S/N"
- Typically 8–12 characters long
- Usually near the model number
Can't find it? Try removing access panels or checking behind the temperature dial.
Takagi Serial Number Examples
Don't worry if yours looks different — Takagi has multiple formats and our system can decode most variations.
About Takagi Water Heaters
Takagi water heaters represent Japanese engineering excellence and innovation in tankless water heating technology. Founded in 1946 in Fuji City, Japan, Takagi Industrial Co. has been a pioneer in developing on-demand water heating systems. The company entered the North American market in 1998 and has established itself as a trusted name among professional contractors and homeowners seeking reliable, energy-efficient hot water solutions.
Takagi manufactures a comprehensive range of tankless water heaters for residential and commercial applications. Their T-H3 series offers high-efficiency condensing performance with up to 0.95 UEF ratings, while the T-K4 series provides compact solutions for smaller spaces. All models feature advanced temperature control and modulating gas valves for precise hot water delivery. Takagi backs its products with up to 15-year heat exchanger warranties on residential units. For units made 2009 and later, serial numbers use a YYWW format where the first two digits indicate the year and the next two digits indicate the week of manufacture. For older units (pre-2009) with 8-digit sequential serial numbers, please contact Takagi directly at 888.882.5244 to determine the manufacturing date.