Fix a Leaking Outdoor Faucet
An outdoor faucet that drips from the spout, sprays from the handle, or leaks every time a hose is attached is one of the most forgiving repairs in the house — provided you first find out whether you have a standard hose bib or a frost-free sillcock, because they leak in different places. The standard bib leaks at its packing nut and washer. The frost-free version, whose valve seat sits a foot inside the wall, leaks the same way but a foot further in. Either way, the fix is usually a wrench, a washer, and twenty minutes — unless the pipe inside the wall has frozen and split, which is the one case where this stops being DIY.
What is actually broken
A standard hose bib is a simple valve: a handle turns a stem, the stem presses a washer onto a seat, and a packing nut around the stem keeps water from escaping along the stem itself. Two wear points, two leaks: a worn washer drips from the spout when the faucet is off, and loose or dried packing leaks from around the handle when it is on. A frost-free sillcock moves the washer and seat to the end of a long stem inside the heated wall, so the water left in the exposed part drains out and cannot freeze — but its washer and packing wear exactly the same way, and a hose left attached in winter defeats the whole design by trapping water in the stem. The vacuum breaker on top, required by code in most places, is a third leak point: it sprays or dribbles when its internal seal fails, which looks alarming and is a five-dollar cap swap.
Safety first
- Find and test the interior shutoff for the outdoor faucet before you open anything. Many outdoor faucets have their own interior valve — if yours does not, the main shutoff is the fallback.
- Never leave a hose attached to a frost-free faucet over winter. A trapped hose holds water in the stem, the stem freezes, and the pipe splits inside the wall — the most expensive version of this repair.
- If the wall inside is wet, bowed, or stained near the faucet, stop — that is a split pipe inside the wall, and opening the faucet further will only add water to it.
- Do not overtighten the packing nut. A quarter-turn at a time, testing between turns, is the method — a crushed packing leaks worse and a snapped stem ends the DIY.
The fix, step by step
1 Identify the faucet type and shut the water off
Look at the faucet: a short body mounted flush to the wall with the handle right at the wall is a standard hose bib; a longer body whose handle sits several inches out from the wall, often labeled frost-free, is a sillcock. Find its interior shutoff — usually a valve on the same pipe inside, near the wall — and close it, then open the outdoor faucet to drain the line. If there is no dedicated shutoff, close the main and drain the line the same way.
Tip: A frost-free faucet that still drips after the interior valve is closed may be fed by a valve that itself leaks — note that, because it changes the repair from the faucet to the valve.
2 Fix a handle leak: tighten or repack the packing nut
With the faucet off and the line drained, look at the nut just behind the handle where the stem enters the body. Tighten it a quarter-turn with a wrench, restore water, and test: if the handle leak stops, you are done. If it still weeps, shut the water off again, unscrew the packing nut, wrap new packing string or PTFE packing around the stem a few turns, and refit the nut snugly. This is the most common outdoor-faucet fix there is, and it takes minutes.
Tip: Packing that crumbles when you touch it is done — replace it rather than tightening harder. Tightening dead packing only scores the stem.
3 Fix a spout drip: replace the washer (or the stem on a frost-free)
A drip from the spout with the faucet off means the washer is not seating. Shut the water off, unscrew the handle and stem assembly, and look at the washer on the end: if it is grooved, hardened, or missing, replace it with a matching washer — bring the old one to the store, because sizes look identical until they are not. On a frost-free sillcock, the washer sits at the far end of the long stem; pull the whole stem out, replace the washer, and refit it. If the seat itself is pitted or rough, a seat-dressing tool smooths it — or the faucet body is done.
Tip: A washer that fails again within weeks means the seat is pitted. Replacing washers on a pitted seat is a loop; dress the seat or replace the faucet.
4 Fix a vacuum-breaker leak
The vacuum breaker is the small cap or cylinder on top of the faucet, above the spout. If it sprays, dribbles, or hisses when the faucet runs, its internal seal has failed. On most models the cap unscrews by hand or with pliers (it may have a small breakaway set screw — if it snaps, that is by design, and the replacement cap comes with a new one). Swap in a matching vacuum-breaker cap, hand-tight plus a quarter-turn, and test. Do not remove the breaker and cap the hole: it is a backflow device, and removing it risks contaminating the house water supply.
Tip: A breaker that leaks only when a hose is attached and the faucet is off is doing its job badly — its seal is gone. Replace the cap, not the faucet.
5 Test, winterize, and know the freeze-damage signs
Restore water slowly and test every position: off (no spout drip), on (no handle or breaker leak), and with a hose attached (no spray at the connections). Then winterize: disconnect all hoses, drain the line, and leave frost-free faucets open a crack over winter so any trapped water can escape. If water appears inside the wall, the interior shutoff area is wet, or the faucet leaks from inside the wall itself, shut the water off and call a plumber — a freeze-split pipe inside the wall is not a faucet repair.
Tip: The cheapest freeze insurance is also the simplest: hoses off before the first freeze, every year, without exception.
Stop and call a pro if…
Call a plumber if: the wall inside is wet, bowed, or stained; water leaks from inside the wall; the faucet body is cracked or the seat is too pitted to dress; the interior shutoff valve itself leaks or will not close; or the pipe has frozen and split. Those are wall, valve, or pipe jobs, not faucet adjustments.
Your work, your responsibility
If you do this repair yourself: you attempt it entirely at your own risk. This guide is general information, not professional advice, and it can be wrong or incomplete. ClickTheFix is not responsible for injury to you or anyone else, or for damage to your property, that results from following — or misfollowing — this guide. Follow the safety warnings, use proper protective gear, follow the manufacturer's instructions and your local codes, and stop if any step is beyond your skill or comfort.
If a contractor does the work: any contractor you hire is an independent professional working under an agreement between you and them alone. ClickTheFix does not provide repair services, does not supervise or control their work, and does not guarantee or warranty it. ClickTheFix is not liable for a contractor's errors, omissions, poor workmanship, property damage, or injuries.