How to read Rain Bird sprinkler valves serial numbers
This covers Rain Bird. The serial number is on a date stamped into the valve body. It isn't a serial number. Rain Bird's warranty guide has photos of where it is on each valve.
Reading it yourself
The day of the month, a two-letter month (JA is January, JN is June, JU is July), the year, then a letter for the product line. 23 JN 10 D is June 23, 2010.
Example:
23 JN 10 Dwas made in June 2010.
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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