How to Shut Off and Winterize Outdoor Faucets

An outdoor faucet that freezes does not just affect the spigot—the ice expands backward into the pipe inside your heated wall cavity. When this interior pipe bursts, it can release hundreds of gallons of water into your walls, insulation, and flooring before you notice. Water damage remediation averages $3,000–$7,000 for a single burst pipe, while proper winterization takes 10–15 minutes and costs nothing. The freeze risk is highest when temperatures fluctuate around freezing overnight. Even a single night below 20°F can freeze an unprepared exterior faucet. The cost of prevention is essentially zero—disconnect hoses, shut off the interior valve, drain the line, and install an insulated cover. Making outdoor faucet winterization a part of your annual fall routine saves significant money and stress.

Start by disconnecting and draining all garden hoses—hoses left attached trap water in the faucet and guarantee freezing. Locate the interior shutoff valve for the outdoor faucet. Turn the valve clockwise to close it completely. Next, go outside and open the outdoor faucet to allow any remaining water to drain out. Leave the faucet open throughout winter to prevent pressure buildup from any residual water that might freeze. If your shutoff valve has a bleeder cap (a small brass cap on the side), open it to drain water from the pipe between the shutoff and the faucet. Finally, install an insulated foam faucet cover over the outdoor spigot and secure it with the attached drawstring. This simple process takes 10 minutes and protects your home from a potentially catastrophic burst.

Frost-free sillcocks require a slightly different approach. Begin by disconnecting all hoses. Unlike standard faucets, frost-free models should be closed (handle in the off position) to ensure the valve stem is fully extended into the heated interior space. With the valve closed, go outside and confirm that no water drips from the spout. If it drips, the interior valve is not sealing properly and may need repair or replacement. Some frost-free models have a vacuum breaker on the outdoor spout that must be removed and stored indoors during winter—check your manufacturer instructions. Even with frost-free faucets, having an interior shutoff valve provides a second layer of protection. Install an insulated cover for additional defense during extreme cold events.

Many outdoor faucets supply sprinkler systems or drip irrigation lines that require additional winterization. For underground irrigation systems, locate the main shutoff and the backflow preventer. Close the shutoff valve and open the test cocks on the backflow preventer to drain water. Most professional installations include drain valves at low points in the system that should be opened to allow complete drainage. Use an air compressor to blow out remaining water from sprinkler lines—this is called blowout winterization and is critical in freeze-prone regions. If you are not comfortable blowing out the system yourself, schedule a professional irrigation winterization service in early fall. Neglecting irrigation system winterization can damage valves, sprinkler heads, and underground pipes that are expensive to excavate and replace.

Several issues can complicate outdoor faucet winterization. If the interior shutoff valve is stuck, apply penetrating oil and wait 15 minutes before attempting to turn it. A valve that will not close fully may need replacement—call a plumber if it cannot be repaired. If the outdoor faucet continues to drip after shutting off the interior valve, the faucet washer or cartridge may be worn. Replace these components while the water is shut off. If you cannot find an interior shutoff valve for your outdoor faucet, your home may not have one. In this case, you must blow out the line using an air compressor or install a shutoff valve—a straightforward job for a plumber that costs $100–$200 and is well worth the investment.

The economics of outdoor faucet winterization are clear. Prevention costs: foam faucet cover ($5–$15), pipe insulation sleeve ($3–$8 per 6-foot section), and your time (10 minutes). If you need a new shutoff valve installed, expect $100–$200 from a plumber. Compare this to the cost of repairing a burst pipe inside a wall: drywall removal and repair ($300–$800), pipe repair or replacement ($200–$600), insulation replacement ($200–$500), and water damage remediation ($1,000–$5,000). In severe cases, mold remediation adds $2,000–$6,000. Total cost of a single frozen outdoor faucet burst: $1,500–$7,000 or more. The return on investing 10 minutes and $10 in fall faucet protection is effectively infinite.

Winterization needs vary by climate. In the Deep South and coastal California, where freezing temperatures are rare, disconnecting hoses and installing a foam cover may be sufficient. In the Midwest, Northeast, and mountain states, interior shutoff and complete draining are mandatory. Homes in the Pacific Northwest face unique challenges—prolonged above-freezing rain followed by sudden freezes creates ice buildup that damages exposed pipes and faucets. In the Mountain West, high altitude means more dramatic temperature swings; winterize by mid-October. Homes in Canada and northern-tier states should consider installing frost-free sillcocks with integral shutoff valves. For new construction or replacement, specify a quarter-turn ball valve shutoff for outdoor faucets—these are more reliable and easier to operate than multi-turn gate valves.