A leaky outdoor faucet is one of the most common — and most ignored — plumbing problems in any house. That slow drip might look harmless, but a faucet leaking one drop per second wastes more than 3,000 gallons of water a year, and in cold weather it can freeze, crack the pipe inside your wall, and turn a $5 repair into a $500 one. The good news: in most cases the fix takes about 20 minutes, costs less than $10 in parts, and needs no plumbing experience. The culprit is almost always a worn rubber washer or a loose packing nut, and both are easy to replace yourself.
Key Takeaways
- Most outdoor faucet leaks come from a worn washer or a loose packing nut — both are cheap, easy fixes.
- The whole repair usually takes 20–30 minutes and costs under $10 in parts.
- Always shut off the water and drain the line before you take anything apart.
- If the leak is coming from inside the wall, or the pipe is cracked, stop and call a plumber.
Why Your Outdoor Faucet Leaks
Outdoor faucets — also called hose bibs or sillcocks — live a harder life than any tap inside your house. They sit outside in sun, rain, and freezing cold, and they get yanked around every time someone drags a hose across the yard. After a few seasons, a few things give out:
A worn washer. At the end of the faucet stem sits a small rubber washer that presses against the valve seat to stop the water. Every time you turn the tap off, the washer compresses a little more. After a few years it hardens, cracks, or wears flat — and water starts seeping past it. This is the cause of the classic drip-drip-drip from the spout.
A loose packing nut. The packing nut sits just behind the handle and squeezes packing material around the stem to seal it. If water is leaking around the handle or stem (rather than from the spout), the packing nut has usually worked loose or the packing inside has dried out.
Freeze damage. Water left in the faucet or hose over winter expands as it freezes and can split the pipe or crack the faucet body itself. A faucet that starts leaking badly in spring, right after the first warm weeks, is often a freeze casualty.
Corrosion and mineral buildup. In hard-water areas, mineral deposits build up on the valve seat and stop the washer sealing properly. On older brass faucets, corrosion can pit the seat so badly that no new washer will seal it.
The first step of any repair is figuring out where the water is coming from: from the spout means the washer (or the seat); from around the handle means the packing nut. That tells you exactly which fix to do.
Tools and Materials You’ll Need
You probably own most of this already. Everything on the list is available at any hardware store for a few dollars.
| Item | What it’s for | Approx. cost |
|---|---|---|
| Adjustable wrench | Removing the packing nut and bonnet | Already owned / $8–$12 |
| Screwdriver (flathead and Phillips) | Removing the handle screw and stem screw | Already owned |
| Replacement washer assortment | The most likely fix — get a multi-size pack | $3–$5 |
| Packing string or graphite packing | Resealing around the stem if it leaks at the handle | $3–$4 |
| Plumber’s grease (silicone) | Lubricating the new washer and stem threads | $4–$5 |
| Old towel and a bucket | Catching the water left in the line | Already owned |
| Penetrating oil (e.g. WD-40) | Freeing a stuck packing nut on an old faucet | $4–$6 |
Total parts cost for the most common repair: under $10. If you buy a washer assortment pack, keep the leftovers — the same washers fit most indoor taps too.
How to Fix a Leaky Outdoor Faucet, Step by Step
Work through the steps in order. Most leaks are fixed by Step 4 — the later steps are only for stubborn cases.
Step 1: Turn Off the Water and Drain the Line
Find the shut-off valve for the outdoor faucet, usually on the pipe inside the house, in the basement, or under a sink on the same wall. Turn it off, then open the outdoor faucet fully and let the water drain out. Hold a bucket under the spout — a surprising amount of water sits in the line. If you can’t find a dedicated shut-off, turn off the main water supply to the house. Never take a faucet apart with the water still on.
Step 2: Remove the Handle and Packing Nut
Unscrew the handle screw in the centre of the handle and pull the handle off — a gentle wiggle usually frees it. Behind it you’ll see the packing nut, a hexagonal nut around the stem. Hold the faucet body steady with one hand (or a second wrench) and loosen the packing nut with your adjustable wrench, turning counter-clockwise. If it won’t budge, spray penetrating oil on the threads, wait ten minutes, and try again. Never force it so hard that the pipe behind the faucet twists.
Step 3: Pull the Stem Out and Inspect the Washer
With the packing nut off, unscrew the stem assembly by turning it counter-clockwise, just as if you were opening the tap — it will wind itself out of the faucet body. At the end of the stem you’ll find a small screw holding a rubber washer. Look at the washer closely: if it’s flattened, cracked, hardened, or has a groove worn into it, you’ve found your leak. Also run your finger over the valve seat inside the faucet body — the ring the washer presses against. If it feels rough or pitted, note it; you’ll deal with it in Step 6.
Step 4: Replace the Washer (and the Packing, If Needed)
Remove the old washer screw, swap in a new washer of exactly the same size, and tighten the screw snugly — not so tight that you split the rubber. Smear a little plumber’s grease on the washer and on the stem threads; it helps the new washer seat properly and makes the tap turn smoothly. If the leak was around the handle rather than the spout, also replace the packing: wind a few turns of packing string around the stem where the old packing sat, then refit the packing nut.
Step 5: Reassemble, Turn the Water Back On, and Test
Screw the stem assembly back into the faucet body, refit the packing nut — tighten it firmly, then back it off about a quarter turn so the handle still turns freely — and replace the handle and its screw. Turn the water back on at the shut-off valve, then close the outdoor faucet and watch it for two or three minutes. No drip from the spout, no weeping around the handle: you’re done. A single drop in the first few seconds is usually leftover water draining out of the spout, not a leak.
Step 6: If It Still Leaks, Check the Valve Seat
A new washer can’t seal against a damaged seat. If the drip continues, shut the water off again and look inside the faucet body at the valve seat. Light roughness can be smoothed with a valve-seat dresser (a $10–$15 tool from the hardware store) — a few gentle turns re-cuts a smooth surface. But if the seat is deeply pitted, cracked, or the faucet body itself is split, the faucet has reached the end of its life and needs replacing, not repairing.
Repair vs. Replace: What It Really Costs
Knowing the numbers makes the decision easy. A washer swap is one of the cheapest repairs in a house; a full faucet replacement is still reasonable, but it costs more and takes longer.
| Job | DIY cost | Plumber cost | Time |
|---|---|---|---|
| Washer replacement | $3–$10 | $75–$150 | 20–30 min |
| Packing nut / packing replacement | $3–$8 | $75–$150 | 15–25 min |
| Valve-seat repair (with dresser tool) | $10–$25 | $100–$180 | 30–45 min |
| Replace standard hose bib | $15–$40 | $150–$300 | 1–2 hours |
| Replace frost-proof sillcock | $25–$60 | $200–$400 | 1–3 hours |
| Repair freeze-cracked pipe in wall | Not a DIY job | $300–$800+ | Half a day |
The rule of thumb plumbers use: if the faucet is under ten years old and the body is sound, repair it. If it’s older, corroded, or has already been repaired more than once, replace it — you’ll spend less in the long run.
How to Keep It From Leaking Again
A few habits will double the life of your outdoor faucet and prevent the most expensive failure of all: a burst pipe in winter.
Disconnect hoses before the first freeze. A connected hose traps water in the faucet and the pipe behind it. Unscrew the hose in autumn, drain it, and store it in the garage. This single habit prevents most freeze damage.
Shut off the interior valve in winter. If your faucet has a shut-off valve inside the house, close it before winter and open the outdoor tap to drain the line. Leave the outdoor tap open through the cold months so any remaining water has room to expand.
Fit an insulated faucet cover. A $5 foam cover over the faucet through winter is cheap insurance, especially if the faucet sits on a shaded or north-facing wall.
Consider a frost-proof sillcock when you replace. A frost-proof faucet has a long stem that puts the actual shut-off valve 8–12 inches inside the warm wall, so water never sits in the exposed part. If you ever replace the faucet, spending the extra $10–$20 on a frost-proof model is money well spent.
Don’t overtighten the tap. Cranking the handle hard shut is what crushes washers flat. Turn it until the water stops, then stop — a quarter turn past that point does nothing but wear the washer out faster.
When to Call a Plumber
Most outdoor faucet leaks are a genuine DIY job, but stop and call a professional if any of these apply:
- Water is leaking from inside the wall or you can see damp, staining, or bubbling paint on the interior wall behind the faucet. That means the pipe, not the faucet, is damaged.
- The pipe behind the faucet is cracked or split, or you can see green corrosion and pitting on copper pipe.
- The faucet is soldered onto the pipe rather than screwed on, and you don’t have soldering experience. A bad solder joint will leak inside the wall.
- There is no interior shut-off valve and you’d have to work with the whole house’s water off, or you can’t find the shut-off at all.
- The leak is combined with low water pressure throughout the house, which can point to a bigger supply problem.
Also call a plumber if you’ve replaced the washer and dressed the seat and it still drips — at that point the faucet body itself is the problem, and a pro can replace it cleanly in an hour or two.
Frequently Asked Questions
Why does my outdoor faucet leak only when the hose is attached?
Because the hose adds back-pressure. A worn washer can still seal against still water, but once the hose is connected and the nozzle is closed, pressure builds up behind the washer and pushes water past it. Replace the washer and the leak should stop with or without the hose.
Can I fix a leaky outdoor faucet without turning off the water?
No — not properly. You need to remove the stem to reach the washer, and with the water on, it will spray everywhere the moment the packing nut comes off. Find the shut-off valve for the faucet or use the main house shut-off. It takes two minutes and saves a flood.
How much water does a dripping outdoor faucet waste?
A faucet dripping once per second wastes roughly 3,000 gallons a year. A faster drip or a thin steady stream can waste 10,000 gallons or more. On a metered water supply, that’s real money — often more in a year than the plumber would have charged to fix it.
Should I replace my outdoor faucet with a frost-proof one?
If you live anywhere that gets below freezing and your current faucet is a standard hose bib, yes — the next time it needs replacing. A frost-proof sillcock shuts the water off deep inside the warm wall, so there’s no water sitting in the exposed part to freeze. It costs about $10–$20 more than a standard faucet and prevents the most expensive outdoor plumbing failure there is.
My outdoor faucet leaks from the handle, not the spout. Is that the same fix?
Almost — but the faulty part is different. A leak around the handle means the packing nut is loose or the packing has dried out. Try tightening the packing nut first (a quarter turn is often enough). If that doesn’t stop it, replace the packing material as described in Step 4. Only if the spout drips do you need a new washer.
Bottom Line
A leaky outdoor faucet is almost never an emergency — but it’s never a repair worth putting off, either. Nine times out of ten, a $3 washer and twenty minutes of your time will stop the drip, and the habits that prevent the next one (disconnect the hose, shut off the interior valve, don’t overtighten) cost nothing at all. If the leak is inside the wall or the faucet body is cracked, that’s the moment to call a plumber — everything before that point is a straightforward DIY fix.