Turn off the water supply to the faucet
Open the faucet to relieve pressure and drain remaining water
Check the handle packing nut and tighten it if loose
Remove the handle and inspect the packing washer or O-ring
Replace any worn or damaged washers, O-rings, or packing material
Inspect the hose bibb stem for cracks, corrosion, or wear
Replace the entire stem if it is damaged
Check the vacuum breaker or backflow preventer for leaks and replace if needed
Inspect the connection to the pipe and tighten or reseal if necessary
Apply plumber’s tape to threaded connections if reassembling threaded parts
Reinstall the handle and turn the water supply back on
Test the faucet for leaks
Replace the entire outdoor faucet if repairs do not stop the leak