Why Does My Outside Faucet Leak When Turned On?

If your outside faucet, also known as a hose bib or spigot, leaks when turned on, it can be both frustrating and wasteful. Understanding the potential causes of this issue can help you address it effectively. Here are some common reasons why your outside faucet might leak when in use and how to fix them:

1. Worn or Damaged Washer

Cause: The most frequent cause of a leaking faucet is a worn or damaged washer inside the faucet. The washer helps create a seal when the faucet is turned off, but over time, it can degrade and cause leaks.

Solution:

• Turn Off the Water Supply: Locate and turn off the shutoff valve.
• Disassemble the Faucet: Remove the handle, packing nut, and stem to access the washer.
• Replace the Washer: Install a new washer that matches the size and type of the original.
• Reassemble the Faucet: Put all parts back together and turn the water supply back on to test.

2. Faulty Valve Seat

Cause: The valve seat is the part of the faucet where the stem makes contact. If the valve seat is corroded or worn, it can lead to leaking.

Solution:

• Turn Off the Water Supply: Ensure the water is turned off and the faucet is drained.
• Inspect the Valve Seat: Remove the stem and check the valve seat for damage or corrosion.
• Clean or Replace the Valve Seat: Use a valve seat cleaning tool to remove corrosion or replace the valve seat if it’s too damaged.
• Reassemble the Faucet: Reassemble the faucet and check for leaks.

3. Loose or Damaged Packing Nut

Cause: The packing nut helps to seal the faucet and prevent leaks. If it becomes loose or damaged, it can cause the faucet to leak when turned on.

Solution:

• Turn Off the Water Supply: Shut off the water and open the faucet to drain any residual water.
• Tighten the Packing Nut: Use an adjustable wrench to tighten the packing nut. Be careful not to overtighten.
• Inspect for Damage: If the packing nut is damaged, replace it with a new one.

4. Corrosion or Rust

Cause: Corrosion or rust on the faucet components can lead to leaks. This is especially common in older faucets or those exposed to harsh weather conditions.

Solution:

• Turn Off the Water Supply: Shut off the water and drain the faucet.
• Inspect and Clean: Check for signs of corrosion or rust. Clean rusted parts with a wire brush or sandpaper.
• Replace Corroded Parts: If the corrosion is severe, you may need to replace the affected parts.

5. Loose or Damaged Handle

Cause: A loose or damaged handle can affect the operation of the faucet, leading to leaks when it’s turned on.

Solution:

• Turn Off the Water Supply: Ensure the water is turned off before making adjustments.
• Tighten the Handle: Check and tighten any screws or bolts securing the handle.
• Replace the Handle: If the handle is damaged, consider replacing it with a new one.

6. Faulty Faucet Design

Cause: In some cases, the design or age of the faucet might be causing the leak. Older faucets or those with poor design might be more prone to leaks.

Solution:

• Evaluate the Faucet: Assess whether the faucet’s design or age is contributing to the problem.
• Consider Replacing the Faucet: If the faucet is old or has a design flaw, replacing it with a new, more reliable model might be the best solution.

7. Improper Installation

Cause: If the faucet was not installed correctly, it might lead to leaks when turned on.

Solution:

• Check Installation: Inspect the faucet installation to ensure it was done correctly.
• Reinstall if Necessary: If installation issues are found, consider reinstalling the faucet or seeking professional help.

Steps to Fix a Leaking Outside Faucet

1. Turn Off the Water Supply: Locate and turn off the shutoff valve, then open the faucet to drain any residual water.
2. Disassemble the Faucet: Remove the handle, packing nut, and stem to access internal components.
3. Inspect and Replace Parts: Check the washer, valve seat, packing nut, and other components for damage or wear. Replace any faulty parts.
4. Reassemble the Faucet: Put the faucet back together and turn the water supply back on.
5. Test for Leaks: Open the faucet and check for any leaks. Ensure all connections are tight and functioning properly.

Conclusion

A leaking outside faucet can be caused by several factors, including worn washers, faulty valve seats, loose parts, corrosion, or installation issues. By following the steps outlined above, you can diagnose and fix the problem effectively. If you’re unsure or encounter difficulties, don’t hesitate to consult a professional plumber for assistance.

For more home maintenance tips and DIY advice, explore our other guides or leave a comment below if you have any questions!