How to Fix a Leaky Faucet (Step-by-Step Guide)
A dripping faucet wastes over 3,000 gallons of water per year. Here is exactly how to fix it yourself in under 30 minutes.
Why Your Faucet Is Leaking
Most faucet leaks come down to one of three causes: a worn-out O-ring, a corroded valve seat, or a damaged washer. The good news is that all three are cheap and simple to fix. A single dripping faucet can waste over 3,000 gallons of water per year — that is roughly $20/month added to your water bill for absolutely nothing. Before you call a plumber, try these steps yourself. The fix usually takes 15–30 minutes and costs under $5 in parts.
Tools You Will Need
Gather these before you start: an adjustable wrench, a Phillips and flathead screwdriver, replacement O-rings or washers (bring the old ones to the hardware store to match sizes), plumber grease, and a towel. You will also want to have a flashlight handy for seeing inside the faucet body.
Step 1: Turn Off the Water Supply
Look under the sink for the shut-off valves — they are the small knobs on the water lines. Turn them clockwise until they stop. Then open the faucet to release any remaining water pressure. This prevents water from spraying everywhere when you disassemble the faucet.
Step 2: Remove the Handle
Pop off the decorative cap on top of the handle (use a flathead screwdriver to pry it gently). Underneath you will find a screw — remove it and pull the handle straight up. If it is stuck, wrap it in a towel and use pliers to wiggle it free. Do not force it or you may crack the handle.
Step 3: Replace the Washer or O-Ring
Once the handle is off, you will see the stem assembly. Unscrew it and pull it out. At the bottom you will find the washer — a small rubber disc held by a brass screw. If it is cracked, flattened, or hardened, that is your leak. Replace it with an exact match. Also check the O-ring around the stem — if it is worn, replace it too. Apply a thin coat of plumber grease to the new O-ring before reinstalling.
Step 4: Reassemble and Test
Put everything back in reverse order: stem, handle, screw, decorative cap. Turn the shut-off valves back on slowly and test the faucet. If the drip is gone, you have just saved yourself a $150+ plumber visit. If it still drips, the valve seat may be corroded and needs resurfacing — that is when a professional can help.
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