environmental-considerations-in-heating-and-plumbing
How to Safely Drain Your Outdoor Faucets and Hoses for Winter
Table of Contents
Winter weather can be ruthless to outdoor plumbing. When temperatures drop below freezing, any water remaining in hoses, faucets, or pipes expands as it turns to ice. That expansion exerts enormous pressure inside metal or plastic components, often causing cracks, joint failures, or burst pipes. The damage is not only costly to repair but can also lead to water damage inside your home if the freeze travels back into the wall cavity. Properly draining outdoor faucets and hoses is a simple preventive measure that protects your property, saves money, and ensures your plumbing is ready to use when warmer weather returns. This guide walks you through everything you need to know—from understanding different faucet types to using compressed air for extra protection.
Why Proper Winterization Matters
Water expands by about 9% when it freezes. In a confined space like a pipe or a hose fitting, that expansion can generate thousands of pounds of pressure per square inch. The weakest point—often a brass valve seat, a soldered joint, or the hose itself—will give way. Even a small crack can cause a slow leak that goes unnoticed until spring, leading to water damage, mold growth, or foundation issues. For homes with outdoor faucets that are not frost-free, the risk is especially high because the water supply line can freeze inside the house wall. Taking the time to drain and insulate your outdoor faucets prevents these headaches and extends the life of your plumbing system.
Many homeowners overlook the importance of storing hoses correctly. Leaving a hose connected to a faucet can trap water in the spigot, preventing it from draining. This single oversight is one of the most common causes of frozen faucets. A few minutes of winter preparation can spare you a call to an emergency plumber in January.
Types of Outdoor Faucets
Before you start draining, it helps to know what kind of faucet you have. There are two main designs: standard (non-frost-free) faucets and frost-free (or freeze-proof) faucets. Your winterization steps will differ slightly depending on the type.
Standard (Non-Frost-Free) Faucets
These are older-style outdoor spigots that have a short stem. The shut-off valve is located right at the handle, inside the brass body that protrudes outside your home. When you turn off the faucet, water remains in the pipe between the valve and the exterior opening. If that pipe extends into an unheated area, it can freeze. Standard faucets always require interior isolation—either a shut-off valve inside the house—plus draining of the outdoor portion. Many homes built before the 1990s have this type.
Frost-Free Faucets
Modern frost-free faucets have a long stem that extends into the heated part of your home. The actual shut-off valve is deep inside the house, far from the cold exterior. When you turn the handle to the closed position, the water drains out of the exposed portion by gravity. However, these faucets are not completely foolproof. If you leave a hose attached, water can be trapped in the long stem and freeze. Always disconnect hoses from frost-free faucets. Even with frost-free models, many experts recommend shutting off the interior supply valve and opening the outdoor faucet to release any residual water.
Tools and Supplies You’ll Need
- Adjustable wrench or pliers — for loosening stubborn hose connections or shutting off interior valves.
- Faucet key or socket — if you have a freeze-proof sillcock with a vacuum breaker that requires a special tool to open.
- Air compressor with tire chuck or blow-out adapter — optional but highly recommended for blowing out the line.
- Shop vacuum or small drain helper — to suck out water from low spots.
- Insulating foam covers or faucet socks — to protect the exterior spigot.
- Pipe insulation foam tubes — for exposed pipes near the faucet.
- Duct tape or zip ties — to secure insulation in place.
- Bucket or large container — to catch residual drips.
- Marker or tags — to label interior shut-off valves for future reference.
Step-by-Step Guide to Draining Outdoor Faucets and Hoses
Follow these steps carefully for a thorough winterization. The process works for both standard and frost-free faucets, with minor adjustments noted.
1. Disconnect and Drain All Hoses
Remove every garden hose, splitter, or attached accessory from all outdoor faucets. Roll each hose flat to force out standing water. Hold one end elevated and walk your hands toward the other end, pressing out trapped water. If you have a hose hanger, store hoses in a shed, garage, or basement—never leave them on the ground over winter. For extra precaution, you can connect two hoses together and use compressed air to blow them dry, but simply storing them indoors is usually enough.
Important: If you have a hose reel that is not self-draining, tilt it to pour out any water. Reels with a brass or plastic interior can crack if water freezes inside the drum.
2. Shut Off Interior Supply Valves (If Applicable)
Most homes have a dedicated valve inside the basement or crawlspace that controls water to each outdoor faucet. Locate these valves—often near the main water line or under the kitchen sink for a backyard spigot. Turn them clockwise (righty-tighty) to shut off. After closing the interior valve, go outside and open the faucet handle fully. This allows air to enter the system and any trapped water to drain out. Leave the outdoor faucet open through the winter—this prevents any remaining water from being trapped and expanding.
If your home does not have interior shut-off valves for outdoor faucets, you may need to install them. For homes with only one main shut-off, you will have to rely on thorough draining and insulating the faucet itself. In very cold climates, adding a shut-off valve is a worthwhile upgrade.
3. Drain the Faucet (Standard vs. Frost-Free)
For standard faucets: With the interior valve closed and the outdoor spigot open, listen for water trickling out. Wait until the flow stops completely. You can gently tilt the faucet downward (if it is not piped rigidly) to encourage drainage. Using a small air compressor is highly recommended for standard faucets to ensure no water remains in the short pipe stub.
For frost-free faucets: Even though these are designed to self-drain, always disconnect hoses and close the interior shut-off valve. Then open the outdoor faucet. If you have a vacuum breaker or a backflow preventer attached to the faucet, it may need to be removed or turned counterclockwise to allow drainage—refer to the manufacturer’s instructions. Some frost-free faucets have a bleeder cap or a key that opens a drain port. If so, use the faucet key to open that port and let any trapped water escape.
4. Blow Out the Line with Compressed Air (Optional but Recommended)
For extra peace of mind—especially if you live in an area with prolonged subzero temperatures—use an air compressor to force out any remaining water. Set the compressor to a low pressure, around 30–50 PSI (never exceed 80 PSI, as too much pressure can damage the pipe or soldered joints). Attach the air hose to the outdoor faucet using a tire chuck or a specialized blow-out adapter that presses into the spigot opening. Have a helper open the compressor valve quickly while you hold the adapter firmly. You will see a blast of water vapor or droplets exit the faucet. Repeat until no moisture comes out.
If you have a sprinkler system, do not use this method without first consulting the irrigation winterization guidelines—irrigation systems require a full blow-out using a larger compressor and often professional service. For faucets alone, this simple air purge works well.
5. Insulate the Faucet and Exposed Pipes
After the faucet is drained and the handle is left in the open position, cover the spigot with an insulating foam dome or a faucet sock. These covers are designed to trap heat from the building and prevent cold air from reaching the valve. Secure the cover with the drawstring or a zip tie. For pipes running along the exterior wall or through a crawlspace, wrap them with foam pipe insulation. Pay special attention to any bend or joint, as these are stress points. Use duct tape or zip ties to keep the insulation snug.
If you do not have a store-bought cover, you can wrap the faucet in old towels and then wrap a plastic bag tightly around it to keep out moisture. However, foam covers are inexpensive and more effective.
Additional Precautions for Sprinkler Systems
If your outdoor faucet is connected to an underground sprinkler system, winterizing that system is a separate, more involved process. You must either hire an irrigation specialist or carefully follow the system’s manual. Typically, you will:
- Shut off the main valve to the irrigation system (often located inside a valve box in the ground or near the house).
- Open each zone valve manually to release pressure.
- Use an air compressor to blow out each zone one by one until only air and mist exit the sprinkler heads.
- Drain the backflow preventer (if present) by opening the test cocks and allowing water to escape.
- Leave all valves in the open position after blowing out.
Neglecting sprinkler winterization can result in cracked pipes and broken heads that cost hundreds to repair. For detailed steps, consult resources from the EPA’s WaterSense program or your irrigation manufacturer’s website.
Storing Hoses and Accessories
Once hoses are drained, they should be stored in a place where temperatures stay above freezing. A basement, heated garage, or garden shed works well. Avoid leaving hoses on the ground outdoors—even if drained, residual moisture can freeze and damage the rubber or reinforcement layer. Coil the hose loosely to prevent kinks that weaken the material. If you have a hose mender or splitter, remove it and store it inside. Check the rubber washers at the ends of hoses; replace any that are cracked or flattened to ensure a tight seal next spring.
For hose bibs (outdoor faucets) that have a vacuum breaker or anti-siphon device, remove that device and store it indoors. These devices often have small internal passages that can trap water and crack when frozen. Many can be unscrewed with a simple wrench. Keep the parts together in a labeled bag so you can reinstall them in spring.
Checking for Leaks and Repairs Before Winter
Before the cold sets in, inspect all outdoor faucets for drips or leaks. A faucet that seeps water even when fully closed will eventually freeze and may cause a pipe to burst in the wall. To test: shut off the faucet tightly, then place a dry paper towel under the spigot. Check back after 15 minutes. If the towel becomes wet, the washer or O-ring may be worn. Repair or replace the faucet stem before winter. For homes with older faucets, consider replacing them with modern frost-free models—a relatively inexpensive upgrade that pays for itself in avoided repairs.
Also check the caulking around the faucet plate where it enters the house siding. Gaps allow cold air to reach the pipe inside, increasing freeze risk. Apply exterior-grade silicone caulk to seal any openings. For masonry walls, use a hydraulic cement patch if needed.
Finally, locate your main water shut-off valve and ensure it works by testing it (turn it off, then back on). In case a pipe freezes anyway, you will need to shut off the water quickly.
Conclusion
Winterizing your outdoor faucets and hoses is a simple, inexpensive procedure that can prevent thousands of dollars in damage. By disconnecting hoses, draining water from the faucets and lines, shutting off interior valves, and insulating exposed parts, you eliminate the risk of frozen pipe bursts. For extra protection in harsh climates, a compressed air blow-out gives you added confidence. Taking these steps now means you can enjoy a worry-free winter and a hassle-free start to spring gardening. For more detailed guidance, refer to winterization guides from your local water utility or reputable home improvement organizations such as The Family Handyman or This Old House.
Remember: a few minutes of fall preparation saves you from a frozen mess in January. Check your faucets today and protect your home.