Caleb MorganBy Caleb Morgan

Updated November 2026

To repair a frost free outdoor faucet, you shut off the water supply to the valve, remove the stem assembly, and replace the worn washer or seat that’s causing the drip. Most leaks come from one of three parts, and a basic set of hand tools is enough for the job. The whole repair usually takes under an hour if the faucet is accessible.

Shut Off the Water and Drain the Line

Frost free faucets are designed so the valve sits deep inside the wall, with the shutoff point several inches inside the house. That means closing an indoor shutoff valve, if you have one, is the first step. If you don’t have one, you’ll need to shut off the main water supply to the house.

Shopping for one? See our guide: 7 Best Frost-Free Faucet Repair Kit Options for Winter Leaks (2026).

Once the water is off, go outside and open the faucet fully. Let it drain for at least a minute. Any water left in the barrel can spill when you disassemble the unit, and it can also hide a freeze crack.

Remove the Stem and Inspect the Parts

Unscrew the handle, then remove the packing nut and the stem assembly. Frost free faucets use a long stem that runs through the wall, so pull it out slowly and keep it in one piece. Look at the rubber washer on the end of the stem and the valve seat at the bottom of the barrel.

Common signs of wear include flattened or cracked washers, grit caught in the seat, and corrosion on the brass. A worn seat that has pitting usually needs replacing, not just a new washer. Check the stem for kinks or cracks, too, since a bent stem won’t seal even with new parts.

Tools You’ll Need

  • Adjustable wrench or pipe wrench
  • Flathead screwdriver and a small Phillips screwdriver
  • Replacement washer and seat kit matched to your faucet brand
  • Plumber’s grease for the threads and O-rings
  • Old towel or bucket to catch residual water

Replace the Washer and Seat, Then Reassemble

Take your old washer to a hardware store if you can, so you can match the size and thickness. Many faucets use a screw that holds the washer in place, and that screw should be snug but not overtightened, since you can strip the threads. Apply a thin layer of plumber’s grease to any O-rings before reinstalling the stem.

Reassemble in reverse order. Tighten the packing nut just enough to stop leakage around the stem, then reattach the handle. Don’t crank the nut down, because excess force can crack the packing or deform the stem.

Test the Faucet and Check for Freeze Damage

Turn the water back on at the shutoff and open the faucet slowly. Watch for drips at the spout while the handle is closed, and listen for hissing that suggests a seat that isn’t seating. If the faucet still leaks, the seat may be pitted, and you’ll need a new one. If water appears where the barrel meets the wall, check the connections for a cracked pipe.

If the faucet was frozen before you started, look for a split in the barrel or spout. Cracked units often can’t be repaired and should be replaced.

Common Mistakes

  • Forgetting to drain the line before removing the stem, which sends water everywhere.
  • Replacing only the washer when the seat is pitted, which leaves the leak in place.
  • Overtightening the packing nut or the washer screw, which strips threads or cracks parts.
  • Skipping plumber’s grease, which lets O-rings dry out and leak sooner.
  • Working on a faucet with the main supply still on, especially if the indoor shutoff doesn’t seal fully.
  • Plumber’s grease: Keeps O-rings flexible and helps the stem slide smoothly. View on Amazon
  • Frost free faucet repair kit: Bundles washers and seats for the common brands, which saves you a trip to the store. View on Amazon
  • Adjustable wrench: Handles the packing nut and handle without marring the finish. View on Amazon

For more detail on specific brands and parts, see Prier Frost Free Faucet Repair Kit: 5 Best Options Compared (2026) and Arrowhead Frost-Free Faucet Repair Parts: Identify and Replace the Right Ones. If the leak is in the handle rather than the spout, How to Repair a Leaking Outdoor Faucet Handle: Step-by-Step Fix covers that case.

FAQ

Can I repair a frost free faucet without shutting off the main water?

Often you can, if the faucet has its own indoor shutoff valve. Without one, you’ll need to shut off the main supply to avoid spraying water during disassembly.

How do I know if I need a new seat or just a washer?

If the seat is pitted, grooved or rough to the touch, replace it. A new washer alone won’t fix a damaged seat.

When should I call a plumber?

Call a professional if the barrel is cracked, the pipe behind the wall is leaking, or you can’t shut off the water supply safely. Consult a licensed plumber for any work involving gas or electrical components nearby.

Conclusion

Repairing a frost free outdoor faucet comes down to draining the line, replacing the worn washer or seat, and testing carefully before you walk away. Work slowly, match your parts to the brand, and avoid overtightening. With those steps, most winter leaks stop for good.

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Caleb Morgan

About Caleb Morgan

Caleb Morgan is part of our editorial team and reviews and edits our kitchen faucets & sinks guides, checking product details against manufacturer specifications and owner feedback.