Stearns Recreational 4430 - Manual (Page 10)

10
DEFLATION INSTRUCTIONS
Deflating may be accomplished by inserting the deflation tool
located on the dust cap into the end of the oral inflation tube
while gently squeezing the inflation chamber. Reposition the dust
cap over the end of the inflation tube after deflating to help
protect the valve inside.
DO NOT TWIST OR WRING INFLATABLE CHAMBER TO DEFLATE.
If for any reason the oral valve remains open, depress it several
times. If it does not release, discontinue use of this PFD and
return to Stearns Inc for repair. In an emergency situation, hold
thumb over the valve if it will not close.