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Outdoor Faucet Winterization: Protecting Exterior Plumbing

Winterize outdoor faucets and irrigation systems to prevent freezing and costly repairs.

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August 1, 2025
Plumbing Team
4 min read

As fall turns to winter, preparing your outdoor plumbing for freezing temperatures is one of the most important home maintenance tasks. A frozen outdoor faucet (hose bibb) can lead to a burst pipe inside your walls, causing thousands of dollars in water damage. Fortunately, winterization is a simple and quick process.

Step-by-Step Guide to Winterizing Hose Bibbs

Follow these steps for every outdoor faucet before the first hard freeze.

1
Disconnect All Hoses: The first and most critical step is to disconnect your garden hoses from the faucets. A connected hose traps water in the faucet, which will freeze and expand.
2
Locate the Interior Shutoff Valve: For each outdoor faucet, there should be a corresponding shutoff valve inside your home, typically in the basement or a crawl space.
3
Turn Off the Water Supply: Turn the handle of the interior shutoff valve clockwise until it is tightly closed. This stops the flow of water to the outdoor faucet.
4
Drain the Faucet: Go back outside and turn the outdoor faucet on. Any remaining water in the pipe will drain out. Leave the faucet open for the winter to allow any residual water to escape.
5
Drain the Bleeder Cap: Back inside, place a small bucket under the interior shutoff valve. Open the small metal cap on the side of the valve (the bleeder cap) to drain the last bit of trapped water. Tighten it back up when finished.

What About Frost-Free Faucets?

Many modern homes have frost-free sillcocks. These are designed with a long stem so the valve that shuts off the water is located deep inside the warm house. While they provide excellent protection, it is still essential to disconnect your hoses for them to work properly.

Winterizing Irrigation Systems

If you have an in-ground sprinkler system, it requires a more complex process called a "blow-out."

Sprinkler System Winterization

  • The water supply to the system must be shut off and drained.
  • An air compressor is used to blow all remaining water out of the pipes and sprinkler heads.
  • This process is best left to professionals, as using the wrong pressure can damage the system.

Don't forget to drain and store your garden hoses in a garage or shed to prolong their life and prevent them from cracking in the cold.

Don't let a winter freeze catch you off guard. If you need help winterizing your plumbing or have a complex irrigation system, contact Plumber in a Box. Our professional plumbers can ensure your home is protected from the cold.

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