Outdoor Faucet Leaking
A leaking outdoor faucet — also called a hose bib or sillcock — is a common plumbing issue that wastes water and, if left unaddressed, can lead to wood rot and foundation moisture problems. The cause is almost always a worn packing washer or O-ring on the stem, costing under $5 to replace. If the leak is at the handle base rather than the spout, a loose packing nut or degraded stem O-ring is the culprit. This guide covers both spout and handle-base leaks, plus how to inspect for freeze damage before the first spring use.
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Common Symptoms
- Water dripping from the faucet spout when fully turned off
- Water seeping or spraying around the handle base
- Visible moisture or water stain on the exterior wall below the faucet
- Increased water bill with no obvious indoor plumbing cause
- Faucet handle requires more force to stop flow over time
- Water pooling near the foundation or on the patio below the faucet
Most Likely Causes
- 1
Worn Packing Washer (Most Common — Spout Drip)
The packing washer is a rubber or neoprene disc at the base of the stem that presses against the valve seat to stop water flow when the handle is turned off. After years of use, the washer compresses, hardens, and develops cracks, preventing a watertight seal. Replacing this washer ($1–$3) is the standard fix for a faucet that drips from the spout.
- 2
Damaged O-Ring on Stem (Handle-Base Leak)
An O-ring sits on the faucet stem inside the packing nut and seals the stem against the faucet body. When the O-ring degrades, water escapes around the stem and appears as a leak at the handle base rather than the spout. This is distinct from a spout drip and requires accessing the stem assembly to replace the O-ring.
- 3
Loose Packing Nut
The packing nut holds the stem assembly in the faucet body and compresses the packing material against the stem to seal it. Over time, vibration and thermal cycling can loosen the packing nut, allowing water to seep around the stem. Tightening the packing nut 1/4 turn with a wrench often stops a handle-base leak without any parts replacement.
- 4
Cracked Faucet Body from Freeze Damage
In climates that experience freezing temperatures, outdoor faucets left with water in the line can freeze and crack the faucet body or the supply line behind the wall. Freeze cracks typically appear as hairline fractures on the brass faucet body and cause leaks that cannot be repaired — the faucet must be replaced. Inspect for cracks every spring before first use of the season.
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Quick DIY Checks
Inspect the faucet body for hairline cracks each spring before first use — run your hand along all surfaces with the water on and look for any spray or seeping. A cracked faucet body cannot be repaired with washers or O-rings and must be replaced entirely. Attempting to use a freeze-cracked faucet under full pressure can cause the crack to propagate rapidly and flood the wall cavity.
In climates with freezing winters, use a frost-free sillcock (anti-siphon hose bib) to prevent future freeze damage. Frost-free sillcocks have a long stem that pushes the shutoff point 8–12 inches inside the warm wall, ensuring the water column is behind the insulation envelope when closed. Always disconnect garden hoses from outdoor faucets before the first freeze — a connected hose traps water in the faucet body and causes freeze damage even on frost-free models.
- 1Step 1 — Shut off the indoor supply valve to the hose bib: the supply valve for an outdoor faucet is almost always located inside the house — in the basement, crawl space, or utility room — on the water line that runs to the exterior wall where the faucet is mounted. Find and close this valve fully (clockwise). If you cannot locate a dedicated shutoff, close the main house water shutoff. Confirm the water is off by trying to run the outdoor faucet — you should get only a brief drip from residual water, not a sustained flow.
- 2Step 2 — Remove the handle screw and pull off the handle: outdoor faucet handles are typically held by a single Phillips screw on top of the handle, or by a hex set screw on the side. Remove the screw and pull the handle straight off the stem. If the handle is stuck from corrosion or mineral buildup, apply penetrating oil and let it soak for 10 minutes before pulling. Do not use a pry bar — you can crack the faucet body.
- 3Step 3 — Use a wrench to unscrew the packing nut: the packing nut is the large hex nut directly behind the handle on the faucet body. Use an adjustable wrench or channel-lock pliers — turn counterclockwise to loosen. On older faucets the packing nut may be quite tight from years of corrosion; apply penetrating oil if needed and allow 15 minutes before attempting removal. Once loose, unscrew by hand and slide it back along the stem.
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Repair vs Replace
A leaking outdoor faucet caused by a worn washer or O-ring is one of the most straightforward plumbing repairs — under $10 in parts and less than an hour. Even full faucet body replacement is straightforward for a DIYer with basic plumbing skills. The only scenario justifying a plumber is confirmed freeze damage to the supply line inside the wall, where accessing and repairing the cracked pipe requires cutting into drywall.
Est. Repair Cost
$10–$50 (washer/O-ring kit $5–$10; frost-free sillcock replacement $20–$40 plus install)
Est. Replacement Cost
$150–$350 for a plumber to replace an outdoor hose bib
Recommended Tools & Parts
- Buy on Amazon →
Homewerks Frost-Free Sillcock Hose Bib (1/2-inch MIP)
Frost-free anti-siphon outdoor hose bib with an 8-inch or 12-inch stem length that positions the shutoff inside the warm wall space. Made from lead-free brass with a stainless steel stem. Built-in anti-siphon (vacuum breaker) prevents backflow contamination into the household water supply. Available in 4-inch through 12-inch stem lengths to match your wall thickness.
$20–$40
- Buy on Amazon →
Danco Faucet Packing Washers Assortment
Assortment of flat rubber packing washers and beveled washers covering all standard outdoor faucet stem tip sizes. Includes sizes 00 through 3 (the most common range for residential hose bibs and sillcocks). Use the stem washer screw from your existing faucet — it is usually reusable if not stripped.
$5–$10
- Buy on Amazon →
Irwin Adjustable Pipe Wrench (10-inch)
Heavy-duty adjustable pipe wrench for removing and installing packing nuts, supply fittings, and faucet bodies. The self-adjusting jaw locks on hex fittings for a firm grip without slipping. A 10-inch wrench provides enough leverage for stubborn packing nuts on outdoor faucets without over-torquing smaller components.
$20–$35
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
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Related Repair Guides
This section combines editorial `relatedSlugs` from the article source with metadata-based matches so each guide links deeper into the repair library.
Outdoor Faucet Not Working: Hose Bib Repair Guide
Outdoor faucet with no water, low pressure, or a drip from the stem? This guide covers freeze damage inspection, packing nut and washer replacement, vacuum breaker failure, and when to replace the whole hose bib.
Read guide →Pipe Burst from Freezing — How to Stop the Leak and Repair the Damage
Burst pipe from freezing temperatures? Act fast: shut off the main water supply, drain the lines, then repair with a slip coupling or pipe repair clamp — most DIY repairs run $20–$80.
Read guide →Hose Bib Leaking
Hose bib dripping from the spout or leaking around the handle? Tighten the packing nut or swap the washer — most repairs take under 30 minutes.
Read guide →Dripping Faucet Repair — Ball, Cartridge, Ceramic Disc & Compression Fix Guide
A faucet dripping once per second wastes ~3,000 gallons/year and adds $15–25 to your water bill. Covers all four faucet types — compression, ball, cartridge, and ceramic disc — with exact part numbers and step-by-step procedures.
Read guide →Sink Faucet Dripping
Dripping faucet wasting water and driving you crazy? In most cases a worn cartridge or O-ring is the culprit — a $10–$25 part and 30–60 minutes fixes it permanently.
Read guide →Shower Faucet Dripping — Fix a Leaky Shower Valve Without Calling a Plumber
Shower faucet dripping even when off? A worn cartridge or valve seat is almost always the culprit — a $15–$40 part and 45–90 minutes stops the drip for good.
Read guide →Keep Exploring
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Frequently Asked Questions
- My faucet drips from the spout — is that different from leaking at the handle base?
- Yes — these are two different failure points requiring different repairs. A spout drip (water from the end of the faucet when it's closed) is caused by a worn packing washer at the tip of the stem. A handle-base leak (water seeping around the handle or packing nut) is caused by a worn stem O-ring or loose packing nut. Correctly identifying which location is leaking tells you which part to replace.
- How can I tell if my outdoor faucet has freeze damage?
- After a hard freeze, inspect the faucet body closely with a flashlight. Look for hairline cracks on the brass body — they may be subtle. Also turn the water on slowly with your hand cupped around the body: if you feel cold water spraying from the body itself (not from the spout or around the handle), the body is cracked and must be replaced. Internal freeze damage to the pipe inside the wall shows up as reduced pressure or no flow despite the faucet being open.
- What is the difference between a frost-free and a standard hose bib?
- A standard hose bib has the shutoff valve at the exterior wall — the entire faucet body fills with water when open. In freezing weather, any water left in the body can freeze and crack it. A frost-free (anti-siphon) sillcock has a long brass stem (8–12 inches) that extends into the wall — the actual shutoff happens inside the warm wall cavity, so no water remains in the exposed outdoor portion when closed. Frost-free models prevent freeze damage but only if you disconnect hoses before winter (a connected hose traps water and defeats the frost-free design).
- Should I just replace the whole faucet instead of repairing it?
- If your outdoor faucet is a standard (non-frost-free) model and you live in a freeze-climate, it's worth replacing it with a frost-free sillcock at the same time as your repair. The additional cost is $20–$40 for the part, and you eliminate the risk of future freeze damage. If it is already frost-free and in good structural condition, replacing the washer or O-ring is the better choice — modern frost-free sillcocks are built to last 20+ years with periodic washer replacement.