Locate the pivot rod and clevis rod under the sink basin.
Locate the setscrew, which is located at the top end of the clevis rod; the setscrew attaches the clevis rod to the faucet pull knob.
Unscrew the slotted screw so that adjustments can be made to the sink stopper.
Adjust the sink stopper by sliding the clevis rod up or down from the pull knob shaft.
Tighten the setscrew with the slotted screwdriver so that the clevis rod is securely held in place.