A dripping outdoor faucet usually needs a new washer or packing. A frost-free hose bib that has split from freezing leaks inside the wall instead, and only while the valve is open. Test by running the faucet with a hand on the interior wall or by checking the basement ceiling below it.
Two kinds of outdoor faucet
A standard hose bib is just a valve on the outside wall, with the shutoff right there at the exterior. In a climate like ours it will freeze and split unless there is an interior shutoff valve that you close and drain each fall.
A frost-free (or freeze-proof) hose bib looks similar from outside but is a long tube — often 8 to 14 inches — with the actual valve seat at the inner end, inside the heated wall cavity. When you close it, the water stops back there where it is warm, and the exposed tube drains out through the spout. That is why it survives a Colorado winter.
Understanding that difference explains the failure mode that matters.
The failure that hides in the wall
A frost-free bib only drains if nothing is blocking the spout. Leave a hose attached over winter and the hose holds a column of water in the tube. That water freezes, expands, and splits the tube — and the split is usually inside the wall, near the valve end.
Come spring, you open the faucet. The valve seat at the back is intact, so water flows. But now it flows out through the split as well, straight into the wall cavity, the rim joist, or the basement ceiling. Outside, the hose runs normally. Nothing looks wrong. People water the garden all summer on a bib that has been soaking a wall cavity for months.
How to test for it in two minutes
- Go to the basement or crawlspace directly inside the hose bib. Look for staining, swollen wood, rusty nail heads or damp insulation.
- Have someone turn the faucet fully on outside while you watch and listen at that spot. A split will usually show itself immediately.
- If the wall is finished, put a hand flat on the drywall below and inside the bib while the water runs. Damp or cold spreading across the wall is the answer.
- Check your water meter with everything off, then with only the hose bib open briefly. Unexplained consumption is worth chasing.
Reading the smaller leaks
- Dripping from the spout when closed. The washer or seat at the valve end is worn. On a frost-free, that means pulling the whole stem assembly.
- Water seeping around the handle while open. The packing nut or packing washer. Often a small tightening fixes it; if not, the packing is cheap to replace.
- Spraying from the threads where the hose connects. Usually just a missing or flattened hose washer.
- Drip only when a hose is attached. The hose washer or the bib's threads. Harmless but wasteful.
- Loose, wobbling bib. The mounting screws or the pipe behind it. Movement stresses the connection inside the wall — worth fixing before it becomes a real leak.
UV and the other Colorado factor
High-altitude sunlight is hard on anything plastic left outdoors. Hose washers, plastic backflow preventer caps, spigot handles and the hoses themselves degrade faster here than at lower elevation. If a hose washer crumbles when you take it out, that is the UV, and it is a sign to check the rest of the exterior plumbing fittings at the same time.
Also worth knowing: most hose bibs installed today include a vacuum breaker or backflow preventer at the spout — the small domed cap. It stops contaminated water being siphoned back into the drinking water supply if pressure drops while a hose is sitting in a bucket or pool. If yours is broken or has been removed, it should be replaced rather than ignored.
Getting ahead of winter
September is the month for this on the Front Range, ahead of the first hard freeze that typically arrives in early-to-mid October:
- Disconnect, drain and store every hose.
- Open each bib and confirm it drains and then stops dripping.
- If you have standard (non-frost-free) bibs, close the interior shutoff and open the exterior faucet to drain the line.
- Get the irrigation system blown out while you are at it.
- Insulated faucet covers are cheap and help on exposed, wind-hit walls.
If you find a split bib, replacing it is real plumbing — it usually means opening the wall or working from inside the rim joist, and getting the slope right so the new one actually drains. Smith handles plumbing repair and, if you have found water where it should not be, leak detection. Our frozen pipe prevention guide covers the rest of the house.
Frequently asked questions
How do I know if my frost-free hose bib is leaking inside the wall?
Turn the outdoor faucet fully on and immediately check the area directly inside it — the basement ceiling, rim joist or interior wall. A split frost-free bib leaks only while the valve is open, so the water appears as you run it and stops when you close it. Staining, damp insulation or rusty nail heads confirm it.
Why did my outdoor faucet split over the winter?
Almost always because a hose was left attached. A frost-free hose bib drains itself through the spout when closed, but an attached hose traps a column of water in the tube. That water freezes, expands and splits the tube inside the wall, where the damage stays hidden until the faucet is used again in spring.
When should I disconnect hoses in Colorado Springs?
September is the right month. The first hard freeze in the Colorado Springs area typically arrives in early-to-mid October, and a single overnight freeze is enough to split a hose bib with a hose attached. Disconnecting and draining hoses in September also pairs naturally with scheduling an irrigation blowout.
Is a dripping outdoor faucet a big deal?
A drip from the spout or handle is usually a worn washer or packing — wasteful but minor, and often an inexpensive repair. The leak that matters is the one you cannot see: a frost-free bib split inside the wall, which discharges into the structure every time the faucet is used rather than dripping outside.