John Wood Water Heater Age Tool
Decode your John Wood serial number to find the manufacturing date, age, and full specs. Free and instant — no account needed.
Need a plumber? Get free quotes from trusted local plumbers
Are you a plumber? Learn about our partner programShare this tool with friends!
The world's best water heater tool
Finding Your John Wood Serial Number
Check these four spots on your John Wood 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.
John Wood Serial Number Examples
Don't worry if yours looks different — John Wood has multiple formats and our system can decode most variations.
About John Wood Water Heaters
John Wood water heaters were a well-established Canadian brand manufactured by GSW (General Steel Wares) for over a century. In 2006, A.O. Smith acquired GSW and its brands, including John Wood, integrating them into its North American water heater portfolio. John Wood units were distributed primarily in Canada and are recognizable by their distinctive serial number formats, which changed over the brand's long history. Whether your John Wood heater carries an older hyphenated serial or a newer alphanumeric code, the manufacture date is encoded in the first four significant digits.
All Supported Brands
Need a plumber? Get free quotes from trusted local plumbers
Are you a plumber? Learn about our partner programShare this tool with friends!
The world's best water heater tool