Outdoor Faucet Leaking? Find the Leak, Fix It, Winterize
Outdoor faucet leaking? Tell a worn washer from a loose packing nut or a frozen frost-free sillcock, fix the drip, and protect the faucet from winter damage.
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Outdoor faucet leaking usually means a worn washer at the spout, a loose packing nut at the handle, or frost damage inside the wall on a frost-free model. Where the water shows up tells you which. A drip is a half-hour fix; water inside the house means shut it off at once.
Outdoor faucet leaking: find where the water appears
Turn the faucet on and off, and watch each part. A drip from the spout with the handle closed points to the washer or seat. Water around the handle stem points to a loose packing nut or worn packing. Water where the faucet meets the wall points to a loose connection. Dampness inside the house, or a stain on the basement ceiling below, points to a split pipe behind the wall.
| Quick facts: outdoor faucet leaking | |
|---|---|
| Time needed | 20 to 60 minutes |
| Tools | Adjustable wrench, screwdriver, replacement washer, packing string or O-ring |
| Difficulty | Easy for a drip; moderate for a frost-free replacement |
| First step | Shut off the supply to the faucet, inside the house if there is a valve |
What each leak usually means
| Where it leaks | Likely cause | What to do |
|---|---|---|
| Drips from the spout when closed | Worn washer or seat | Replace the washer, or the stem |
| Leaks around the handle | Loose packing nut or worn packing | Tighten a quarter turn, or repack |
| Leaks at the wall | Loose threads or a failed seal | Tighten, reseal with thread tape, or replace |
| Drips from the vacuum breaker cap | Backflow device worn | Replace the vacuum breaker |
| Water inside the wall when on | Split pipe, often from frost | Shut off water and call a plumber |
How to fix a dripping spout or handle
- Shut off the water to the faucet. If there is no interior shut-off valve, close the main valve.
- Open the faucet to drain the line.
- Tighten the packing nut behind the handle by a quarter turn if the leak is at the stem. Do not overtighten.
- For a spout drip, unscrew the packing nut and remove the stem. Replace the rubber washer on the end with an exact match, and the O-ring if it is flattened.
- Reassemble, turn the water on slowly, and check for drips.
- Repack if needed. Wind graphite packing string around the stem under the nut for a handle that still weeps.
Why frost-free faucets fail
A frost-free faucet has a long stem, so the shut-off is inside the warm house. If a hose is left attached, water stays trapped in the barrel and can freeze, splitting the pipe. The damage often shows only in spring as a leak inside the wall when the faucet is turned on. An outdoor faucet leaking only when the hose is connected is a classic sign.
How to winterize an outdoor faucet
- Disconnect every hose, splitter and timer before the first hard frost.
- Close the interior shut-off valve to the faucet if you have one.
- Open the outdoor faucet and leave it open so the line drains.
- Fit an insulated faucet cover over the outside, especially on a standard non-frost-free faucet.
- Keep the basement or crawl space around the supply line from freezing.
When to replace the whole faucet
Replace it if the body is cracked, the threads are stripped, or the stem is corroded. Frost-free replacements are available in several lengths, and a pipe connection with push-fit or soldered fittings is a plumber job if you do not solder. If you find the faucet is outdoor faucet leaking repeatedly after repairs, the body is likely worn out.
What to watch for afterwards
Check the wall and ceiling inside for stains, and run the faucet for a minute with a hose attached to look for slow weeping. Early catches prevent rot and mold. Check again after the first hard freeze of the season, because frost damage often shows only when the faucet is next used.
Related reading
- How to Fix a Leaky Faucet: Find the Type, Replace the Part
- How to Thaw Frozen Pipes Safely: 6 Steps and What to Avoid
- How to Increase Water Pressure in Your House: 7 Checks
- Water in Crawl Space: Causes, Risks and Fixes That Last
Browse all plumbing guides, or find a plumber in your city from the plumbing directory.
Frequently asked questions
Why is my outdoor faucet leaking when it is turned off?
A drip from the spout usually means the rubber washer or seat has worn. Shut off the water, take the stem out and replace the washer. If the seat is pitted or the stem corroded, replace the stem or the whole faucet.
Why is my outdoor faucet leaking around the handle?
Leaks at the handle come from a loose packing nut or worn packing around the stem. Tighten the nut a quarter turn, or wind fresh packing string around the stem under the nut. Do not overtighten or the handle will bind.
How can I tell if my frost-free faucet has frozen and split?
Turn the faucet on and check inside the house near where the pipe goes through the wall. Dampness, a drip or a stain below means the pipe has split. Shut off the water at the interior valve and call a plumber.
How do I winterize an outdoor faucet?
Remove every hose before frost, close the interior shut-off valve if there is one, open the outdoor faucet to drain the line, and fit an insulated cover. A hose left on is the main reason frost-free faucets split.
Can an outdoor faucet leak cause damage inside the house?
Yes. A split pipe or a leak at the wall can soak the framing, insulation and floor, and lead to mold. Check the wall and ceiling inside near the faucet for stains or dampness, particularly after winter.
What is the vacuum breaker on an outdoor faucet?
It is a small backflow-prevention device on the spout that stops dirty water being sucked back into the house supply. If it drips or spurts when the faucet is on, it may be worn and need replacing.
Can I replace an outdoor faucet myself?
If you can shut off the water and the pipe has threaded or push-fit connections, often yes. A faucet soldered to copper needs soldering skills. A plumber is the safer choice if the pipe is inside a finished wall.
When should I call a plumber for an outdoor faucet leaking?
Call if water appears inside the house, if the interior shut-off will not close, if the pipe behind the faucet seems split, or if repairs do not stop the drip. Those cases involve work inside the wall.
Can I fix a leaking outdoor faucet myself?
Often, by replacing the washer, packing nut or O-ring, or by replacing the whole spigot. Shut off the water first and drain the pipe. Frost-free models have a long stem, so take the old one to the store to match the right replacement parts.
Why does my outdoor faucet drip only in winter?
A frozen and split frost-free faucet may leak inside the wall when warm weather returns. Check for water inside, shut off the supply and call a plumber. Fixing it before the next freeze avoids another split, and a faucet cover helps protect it.
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