To prevent outdoor taps (or hose bibs) from leaking, consider the following steps:

1. Inspect and Replace Washers: Most leaks are caused by worn or damaged washers. If your outdoor tap has a screw-on cap, open the tap and replace the washer inside.
2. Tighten Connections: Ensure that all connections are tightly secured. Loose fittings can lead to leaks.
3. Use Thread Seal Tape: For threaded connections, use plumber’s tape (Teflon tape) around the threads to create a watertight seal.
4. Check for Cracks or Damage: Inspect the tap and the pipe it’s connected to for any visible cracks or damage. If present, they may need to be repaired or replaced.
5. Frost-Proof Outdoor Taps: If you experience freezing temperatures, install frost-proof outdoor taps. These are designed to prevent freezing and subsequent leaks.
6. Drain Water from Hoses: Before winter, ensure that you drain any water from hoses and the tap itself to prevent freezing and cracking.
7. Install a Pressure Regulator: If you live in an area with high water pressure, consider installing a pressure regulator to reduce stress on your fixtures.
8. Regular Maintenance: Periodically check your outdoor taps for leaks and perform maintenance as needed. Clean out any debris that may block the flow and cause pressure build-up.
9. Consider New Fixtures: If your outdoor tap is old or consistently leaking, replacing it with a new, high-quality fixture may be the best solution.

By following these steps, you should be able to minimize or prevent leaks from your outdoor taps.