What is a hose bib?
Updated August 2026
A hose bib is the outdoor faucet mounted on the side of your house, the one you thread a garden hose onto. Plumbers also call it a sillcock, a spigot, or a wall hydrant, and the outlet uses the US standard 3/4 inch garden hose thread, so every hose in the country fits it. Two kinds exist, and which one you own decides your entire winter routine.
Where it is
Check the exterior wall closest to the kitchen or a basement utility area; most houses carry two, front and back, set 12 to 24 inches above grade. Inside, follow the pipe back through the rim joist or crawlspace and you will usually find a dedicated shutoff within a few feet of the wall penetration, often with a small bleeder cap on its side. Frost-free models look identical from the outside but hide a stem 8 to 14 inches long that reaches through the wall, putting the actual valve seat in heated space. Quick test: close the interior valve and watch the spigot. A long, slow trailoff means a frost-free stem is draining itself.
What it does
A standard bib holds water back right at the wall, which leaves the final foot of pipe sitting in the cold. Water expands roughly 9 percent as it freezes, easily enough to split copper, and the split lands inside the stud bay rather than at the visible brass. Nothing leaks while it stays frozen. The bill arrives on the first warm morning in spring, when someone opens the valve and 4 to 8 gallons a minute pours into the wall cavity. Frost-free bibs sidestep all of that by keeping the seat indoors, but only when the hose is off, because a connected hose traps water in the stem where it can still freeze and burst the tube. A slow drip at the handle is a separate and much cheaper story: usually a worn packing washer.
Maintenance
Winterizing is the whole program, and it takes about 5 minutes per faucet: pull the hose, close the interior shutoff, open the spigot fully to drain, and leave it open until spring. Do it before the first night below 28 degrees, which the seasonal shutoff schedule ties to your local first-frost date. Add an insulated foam cover, $3–8 each, on any bib with no interior valve. Once a year, work down the rest of the bib service list: snug the packing nut, swap the washer if it drips, and confirm the vacuum breaker cap is not weeping.
What it costs to replace
A replacement hose bib runs $15–40 for the part, or $150–350 installed, more when the wall has to be opened.
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Frequently asked questions
How do I tell if my hose bib is frost-free?
Two clues. A frost-free sillcock turns a long stem, so it takes several full rotations to open and shuts with a distinct seating feel, while a standard bib opens in about a turn and a half. It also mounts with a slight downward pitch so the stem can drain. If you can get behind the wall, the giveaway is an 8 to 14 inch brass tube running inward from the wall plate instead of a plain elbow.
Do I still need to disconnect the hose from a frost-free spigot?
Yes, and forgetting is the most common winter mistake there is. The freeze-resistant design depends on the pipe draining out through the open spout. A hose, a splitter, or even a shut-off quick connect seals that end, holds a column of water in the stem, and lets it freeze inside the wall. Manufacturers state this plainly in their instructions. Coil the hose in the garage and most of the risk disappears for free.
Why does my hose bib leak from the top only while the water runs?
That is the vacuum breaker, the small brass or plastic cap sitting on top of the spout. Its rubber disc has hardened or a bit of grit is propping it open, so water escapes under pressure and stops the moment you close the valve. A replacement cap kit costs $6–12 and swaps out with a screwdriver in a few minutes. Some are held by a setscrew hidden under the cap, some simply pop off.
What does it cost if the pipe behind a hose bib bursts?
The faucet is the cheap part. A split supply line inside the wall runs unnoticed for hours, so repair bills cluster around $1,500–6,000 for drywall, insulation, and flooring, and climb higher when it drains into a finished basement. The full damage ladder starts from a $15 cracked stem. Since a 5 minute shutoff prevents all of it, this is the highest-return chore on the fall list.