How to read Hayward pool equipment serial numbers
This covers Hayward. The serial number is on the data plate on the pump housing, filter or heater. Use the housing's plate, not the motor's, because motors get swapped.
Reading it yourself
Since August 2015: 17 digits that start with 21. The next two digits are the plant. Digits 5 and 6 are the year and digits 7 and 8 are the month.
Example:
2113 1604 101589001was made in April 2016.
This is the date the unit was made. It was usually installed soon after, but it can be later. If a serial doesn’t fit any of these patterns, look on the label for a printed manufacture date.
Sources
Checked in October 2026.
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