Why Your Outdoor Faucet Is Leaking (and When It's a Bigger Problem)
An outdoor faucet leaking is the most common exterior plumbing problem we get called about in Gaithersburg, and most of the time it's a two-dollar part, not a two-hundred-dollar fixture. The trick is reading where the drip is coming from, because a leak at the handle, a leak from the little cap on the side, and a leak that only shows up when the water is running are three different faults with three different fixes. Below is how to tell them apart, plus the one leak pattern that means you should stop turning the handle and call us: (301) 834-2944.
"Most of the time an outdoor faucet leak is a two-dollar part, not a two-hundred-dollar fixture. The trick is reading where the drip is coming from."
Most Montgomery County homes built between the 1970s and 90s have a standard hose bib threaded into the rim joist or through a brick or block wall. On those older exterior walls the spigot often sits an inch or two proud of the siding with no slope back toward the house, which is exactly the setup that traps water and splits over winter. That building era is worth knowing, because it tells you which failures are likely before anyone touches the valve.
Why is my outdoor faucet leaking?
An outdoor faucet leaks for one of four reasons: a worn washer or seat inside the valve, loose or dried packing behind the handle, a failed vacuum breaker (the anti-siphon cap on newer spigots), or a pipe that split from a freeze. The fix depends entirely on where the water shows up. Look before you tighten anything, because tightening the wrong nut is how a small drip becomes a stripped valve.
Here's how each leak location maps to a cause and a fix:
| Where it leaks | Likely cause | Typical fix |
|---|---|---|
| From the spout, only when off | Worn washer or seat | Replace washer/seat |
| Around the handle when running | Loose or dry packing | Tighten or repack the nut |
| From the cap on the side/top | Failed vacuum breaker | Replace the breaker cartridge |
| Inside the wall, or only under pressure | Split pipe from a freeze | Replace the hose bib / repair pipe |
If you can match your leak to one of the first three rows, you're looking at a straightforward outdoor faucet and hose bib repair. The fourth row is the one that costs real money, and we'll cover it below.
Hose bib dripping from the handle
A hose bib dripping from the handle when the water is running is almost always the packing nut, the hex nut right behind the handle. Give it a gentle snug with a wrench, a quarter turn at a time, and the drip usually stops. If it doesn't, the packing washer underneath has dried out and needs replacing, which is a ten-minute rebuild with the water shut off.
"A drip at the handle is packing. A drip at the spout is the washer. They're different parts, and knowing which one you've got means the right thing shows up on the truck the first time."
One thing worth saying plainly: don't crank the packing nut down hard to kill a drip. Over-tightening it makes the handle stiff and can crack the bonnet on an older brass spigot, and now you've turned a washer job into a full replacement. Snug, test, stop. If it's still weeping after a gentle tighten, that's your cue to leave it and have the fixture repaired rather than fight it.
Frost-free faucet leaking (and why it's different)
A frost-free faucet leaking usually leaks for a reason unique to its design: the valve seat sits 6 to 12 inches back inside the warm wall, and the long stem carries water out to the spout. When a frost-free unit drips, the washer at that deep seat is worn, or the spigot is pitched wrong so water can't drain out of the stem after you shut it off. That trapped water is what freezes and splits the pipe.
The difference between the two common spigot types matters when you're deciding whether to repair or upgrade:
- Standard sillcock: the shutoff is right at the wall, so water sits in the exposed section all winter. Cheap, but freeze-prone unless you drain it every fall.
- Frost-free sillcock: the shutoff is deep inside the heated wall and the stem self-drains, so the exposed part stays empty. Far safer against a hard freeze, as long as it's installed with the correct downward pitch and you disconnect the hose.
That last point trips people up every winter. A frost-free faucet is only frost-free if the hose is off. Leave a hose attached and water can't drain back out of the stem, so it freezes and cracks exactly like a standard spigot would. If yours already split over a past winter, a repair usually means swapping the whole sillcock rather than a washer, because the crack is in the buried tube.
Not sure which type you have? Call and describe it: (301) 834-2944.
Not sure you even need us? Read this first.
When a dripping hose bib means a bigger problem
Here's the leak that isn't cosmetic. If your outdoor faucet only leaks when the water is running, and you can't see where it's going, water may be draining backward into the wall through a split in the pipe behind the siding. On the 1970s to 90s exterior walls common across Gaithersburg and the rest of Montgomery County, that water tracks down the framing and shows up as a stain on interior drywall, a musty smell, or a soft spot on the floor below well before you'd ever spot it outside.
This is the classic aftermath of a hard freeze. Water expands as it freezes, splits the copper or galvanized pipe feeding the spigot, and the crack stays hidden all winter because the split section is empty. Then spring comes, you hook up the hose for the first time, and the pipe that split in January starts pumping water into the wall the moment you open the valve.
"The first warm Saturday in spring is our busiest day for split hose bibs. People turn the outside water back on, and a pipe that cracked over winter finally gets tested."
If you suspect this, shut off the water to that spigot (there's often a small drain-and-shutoff valve on the interior side of the wall) and don't turn it back on. A leaking spigot feeding water into the wall needs the wall opened to find and fix the split, and the longer it runs, the more framing and drywall you're replacing. When in doubt, call before you flood the cavity: (301) 834-2944.
The fall shut-off routine that prevents most of this
Nearly every split hose bib we replace in the spring could have been prevented with ten minutes of work the previous fall. The freeze-thaw swing along the Maryland side of the DC metro, where an afternoon in the 40s can drop into the teens overnight, is exactly the cycle that finds any water left sitting in an exposed pipe.
- Disconnect every hose. A connected hose holds water in the spigot and defeats a frost-free faucet entirely. This is the single most important step.
- Find the interior shutoff. Many county homes have a dedicated shutoff for the outdoor line in the basement or crawlspace. Close it.
- Open the outside spigot and drain it. With the interior valve closed, open the outdoor faucet to let the trapped water run out, then leave it open through the winter.
- Bleed the bleeder cap. If your interior shutoff has a small cap on the side, loosen it to let the last of the water drain from the pipe run.
- Cover it if it's a standard sillcock. An insulated foam cover is cheap freeze insurance on the non-frost-free spigots.
Do that before the first hard freeze and you skip the spring surprise entirely. If your home doesn't have an interior shutoff for the outdoor line, that's worth adding, and it's a small job compared to opening a wall.
Repair or replace your outdoor faucet?
Repair is the right call for a worn washer, a loose packing nut, or a failed vacuum breaker, which covers most drips. Those are parts-and-labor fixes on a spigot that's otherwise sound. Replacement makes sense in fewer cases, and it's an honest short list rather than an upsell.
- The pipe behind the spigot split from a freeze (the fix is a new sillcock either way).
- The valve body is cracked or the threads are stripped from over-tightening.
- You're upgrading a freeze-prone standard sillcock to a frost-free unit before winter.
- The spigot is old enough that replacement parts aren't made for it anymore.
What we won't do is quote you a replacement for a drip we haven't looked at. Tell us where it's leaking from and roughly how old the spigot is, and you'll get a straight answer about whether it's a part or a fixture. Request a free estimate through the contact form, or call the shop: (301) 834-2944.
Frequently asked questions
How do I fix an outdoor spigot leak myself?
For a leak from the spout, shut the water off, remove the handle and packing nut, and replace the washer at the end of the valve stem with one from a hose-bib washer kit. For a leak at the handle while running, snug the packing nut a quarter turn at a time. If the drip persists after a new washer, the valve seat is worn or the pipe is compromised, and that's the point to stop and call (301) 834-2944.
Should I replace my outdoor faucet or just repair it?
Repair, in most cases. A worn washer, dried packing, or a failed vacuum breaker are all part swaps on a spigot that's otherwise fine. Replace it when the pipe behind it split over winter, when the valve body is cracked, or when you want to upgrade a freeze-prone standard sillcock to a frost-free one before the cold sets in. A drip alone is rarely a reason to replace the whole fixture.
Why does my outdoor faucet only leak when the water is on?
That pattern points to packing (if the water shows at the handle) or, more seriously, to a split in the pipe behind the wall (if you can't see where the water goes). A leak that only appears under pressure and disappears when you shut off the valve is the signature of a freeze crack draining into the wall cavity. Shut that spigot off and have it looked at before you run it again.
Do you work on hose bibs in Gaithersburg and the rest of Montgomery County?
Yes. Holdsy Plumbing is a family-owned Gaithersburg shop, and outdoor faucets, hose bibs, and the pipe runs behind them are everyday work for us across the county. Call (301) 834-2944 and tell us where it's leaking, or send the details through our contact page for a free estimate.
