Caleb MorganBy Caleb Morgan

Updated November 2026

Learning how to repair a garden faucet usually comes down to one of three jobs: replacing a worn washer, replacing the valve seat, or swapping the stem assembly. Most outdoor faucets can be fixed in under an hour with basic hand tools and a few inexpensive parts. This guide walks through diagnosing the problem, shutting off the water safely and completing the repair.

Diagnose the Leak Before You Take Anything Apart

Where the water escapes tells you what has failed. A drip from the spout when the handle is closed usually points to a worn washer or a damaged valve seat. Water leaking from around the handle or the packing nut points to a worn stem packing or O-ring. Water spraying from the base where the faucet meets the pipe often means a cracked or loose connection, which is a different repair.

Shopping for one? See our guide: 6 Best Garden Faucet Leak Repair Kits and Parts Compared (2026).

Turn the handle on and off a few times while you watch. If the leak only appears when the handle is fully closed, the washer is the likely culprit. If it leaks only when open, check the packing.

Shut Off the Water and Drain the Line

Garden faucets are fed from a supply line that often stays pressurized even after you close the faucet. Find the shutoff valve for the faucet, which may be in the basement, crawl space or inside a wall, and turn it clockwise until it stops. Then open the faucet fully and let the remaining water drain. Freezing weather can leave water trapped in the body of a frost-free model, so drain it completely before you loosen anything.

Replace the Washer, Seat or Stem

Once the water is off, follow these steps for a standard compression faucet:

  1. Remove the handle screw, usually under a decorative cap, and lift off the handle.
  2. Unscrew the packing nut with an adjustable wrench, then pull out the stem assembly.
  3. Inspect the rubber washer at the bottom of the stem. If it is cracked, flattened or missing, replace it with a washer of the same diameter and thickness.
  4. Check the brass valve seat inside the faucet body. If it is pitted or grooved, unscrew it with a seat wrench and replace it.
  5. Replace the packing washer or O-ring on the stem if it shows wear or hardening.
  6. Reassemble in reverse order. Tighten the packing nut snugly, but do not overtighten it, since that can crack the body or make the handle hard to turn.

Frost-free faucets work differently. Their valve sits deep inside the pipe, so the replacement part is usually a complete stem or a repair kit matched to the manufacturer. Check the faucet body for a brand name or model number before buying parts.

Test the Repair and Protect Against Future Leaks

Turn the main supply back on slowly. Open the faucet with the handle fully on, let air and water flow for a minute, then close it. Watch the spout and handle for drips over several minutes. If the leak persists, the valve seat may still be damaged or the stem may be installed incorrectly.

In cold climates, disconnect the hose and drain the faucet every fall. This prevents the trapped water from expanding and cracking internal parts.

Common Mistakes

  • Skipping the shutoff step, which can soak the work area and make parts harder to hold.
  • Using a washer that is the wrong size, causing it to leak even when new.
  • Overtightening the packing nut, which strips threads and makes future repairs harder.
  • Forgetting to unscrew the hose before starting, since water can back up into the faucet.
  • Buying parts without checking the faucet brand, which often means the parts will not fit.
  • Adjustable wrench helps you loosen the packing nut and valve seat without rounding their edges. View on Amazon
  • Replacement faucet washer assortment lets you match the correct diameter and thickness without a second trip to the store. View on Amazon
  • Valve seat wrench removes a stubborn seat without damaging the brass body. View on Amazon

FAQ

Do I need to replace the whole garden faucet?

Usually not. Washers, packing and valve seats are inexpensive and replaceable, and most leaks come from these small parts. A full replacement makes sense only when the body is cracked or corroded.

Why does my garden faucet drip when it is turned off?

A worn washer or a pitted valve seat prevents a tight seal. Replacing the washer first is the fastest fix, and the seat is the next thing to check if the drip continues.

Can I repair a frost-free garden faucet the same way?

Not exactly. Frost-free faucets have a valve deep in the pipe, so the repair usually means replacing the stem or valve assembly with a kit matched to the manufacturer’s model.

Conclusion

Knowing how to repair a garden faucet saves water and avoids the cost of a full replacement. Start by identifying where the leak occurs, shut off and drain the supply, and replace the worn washer, seat or stem. Test the faucet after reassembly and drain it each winter to keep it working for years.

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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.