A dripping exterior faucet is more than an annoyance; it wastes water, increases utility bills, and can cause significant damage to your home’s exterior. Water seeping into the surrounding wood or siding creates the perfect environment for rot and mold, while a persistent leak often signals internal wear that will worsen over time. Addressing this issue promptly is a critical maintenance task that protects your property and conserves resources.
Understanding the Source of the Leak
Before you begin any repair, it is essential to identify the specific cause of the leak. Most exterior faucets, or hose bibs, fail in one of two primary locations: the stem seal or the body itself. A leak around the handle or spout collar usually points to a worn packing nut or gland seal, while water dripping from the faucet outlet often indicates a failed washer or valve seat. Determining the origin allows you to perform the correct fix without unnecessary disassembly.
Common Failure Points
Worn Washer: The most frequent culprit, responsible for stopping water flow inside the valve.
Loose Packing Nut: The nut securing the handle can loosen over time, allowing water to seep down the stem.
Cracked Body: Freezing temperatures can cause the faucet body to crack, requiring immediate replacement.
Rusted Valve Seat: Corrosion on the internal seat prevents the washer from creating a proper seal.
Preparing for the Repair
Safety and preparation are the foundations of a successful repair. You must eliminate the water supply to the fixture to prevent flooding inside your home’s walls or under the sink. Locate the interior shut-off valve that controls this line and turn it clockwise until it is fully closed. If an interior valve is not accessible, you may need to turn off the main water supply to the house.
Tools and Materials Checklist
Gather your tools before touching the faucet to avoid mid-repair trips to the hardware store. You will typically need an adjustable wrench, a set of channel-lock pliers, screwdrivers (flathead and Phillips), a basin wrench for tight spaces, and a penetrating oil like WD-40. For parts, have a matching replacement washer and, if the leak is severe, a complete faucet kit that includes the packing nut and O-rings.
Step-by-Step Fix: Replacing the Washer
The most common repair involves replacing the rubber washer at the end of the faucet stem. Start by placing a bucket under the faucet to catch residual water. Remove the handle screw, usually located under a decorative cap on the top of the spout. Carefully pry off the cap and unscrew the handle to expose the packing nut.
The Disassembly Process
Use your wrench to loosen and remove the packing nut. Once loose, unscrew the stem entirely from the faucet body. You will see the washer seated on the end of the stem or in a socket at the valve body. Inspect the old washer for cracks or flattening; if it is damaged, it must be replaced regardless of how new it looks.
Addressing a Leaky Spout or Freeze Damage
If the leak is coming directly from the spout or the faucet body is visibly cracked, washer replacement will not solve the problem. In these scenarios, the integrity of the metal has been compromised. Freezing temperatures are a common cause of cracking, as water expands and splits the fixture. Attempting to patch a cracked faucet with sealant is a temporary fix at best, as the pressure will eventually force the leak to reappear.
