I’m not sure what type you have, but all CG approved vests should have maintenance instruction sewn into the vest.
If for some reason you can’t find yours, visit their website. It should be there and as a last resort email the manufacturer.
Here’s from the Float Tech site:
ANNUALLY – Perform the following at the beginning of each boating
season, after inflation, or whenever the integrity of the inflatable PFD is in
doubt:
i) Complete a thorough visually examination of the Inflatable PFD per
section IX – Inspection, on page 17.
ii) Perform the Oral Inflation Valve Test in section XIII.2.ii above.
iii) Perform the Leak Test in section XIII.2.i above.
iv) Inspect CO2 Auto-Inflation Mechanism, in section XIII.3.i above.
v) Re-arm the Inflatable PFD – Replace CO2 Cylinder and Bobbin.
(See Section III.4 and III.5) Ensure the bobbin is valid. The PFD, or
bobbin, must have been purchased within the last three (3) years. If
the purchase date is unknown, check the manufacture date printed
on the bobbin and replace if older than three (3) years.
vi) Clean: [Shall comply with Federal Trade Commission Rule 16 CFR
423. (Such as warning against dry cleaning)] Refer to Section VIII,
Care & Cleaning Instructions, on page 16.\
vii) Record as an “Annual” inspection in permanent ink on the Service
Record Label on the PFD. Repack the Inflatable PFD per this owner’s manual.
Here’s the link to the full instructions if interested.
PFD Manuals in PDF Files<<<