How to Fix a Leaking Faucet at Home (Step-by-Step)
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A dripping faucet is not just annoying — it wastes hundreds of gallons of water every year and quietly inflates your utility bill. The good news? You can fix it yourself in under an hour, with no plumber required.
Whether your faucet drips slowly or streams constantly, the fix is usually straightforward once you understand what type of faucet you have and what is causing the leak. In this guide, we walk you through everything from gathering tools to turning the water back on — no special skills needed, just a little patience and the right information.
A faucet dripping just once per second wastes over 3,000 gallons of water per year according to the U.S. Environmental Protection Agency. That is enough water for more than 180 showers. Fixing it today saves both water and real money on your annual bill.
Why Do Faucets Leak?
The most common cause of a dripping faucet is wear and tear on internal rubber components — specifically washers and O-rings. Every time you turn a faucet on or off, these small parts compress and release. Over thousands of uses they harden, crack, or flatten, and the dripping begins. Other common causes include a worn cartridge, a loose packing nut, a corroded valve seat, or deteriorating supply line fittings beneath the sink.
Identifying the exact source before disassembling anything saves time and helps you buy the right parts on the first hardware store visit — no repeat trips, no frustration.
What You Will Need
Always bring the old washer or O-ring to the hardware store to match the size exactly. Even a slightly wrong size will not seal properly and the drip will continue after the repair.
Step-by-Step: Fix Your Leaking Faucet
Turn Off the Water Supply
Look under the sink for individual shutoff valves and turn them fully clockwise. If there are no valves, shut off the main supply for your home. Once off, open the faucet to release remaining pressure and drain water sitting in the lines. Place a towel and bucket underneath to catch any residual drips during the repair.
Remove the Faucet Handle
Use a flat-head screwdriver to gently pop off the decorative cap on top of the handle. Underneath you will find a Phillips or hex screw — remove it and set it somewhere safe. Lift the handle straight up and off. If it feels stuck, wiggle it gently or apply penetrating lubricant and wait ten minutes. Never force it — older faucet parts can crack under pressure and turn a minor repair into a costly replacement.
Remove the Packing Nut and Stem
Use your adjustable wrench to loosen the packing nut counter-clockwise and remove it. Pull out the stem by turning it in the same direction you open the faucet. Inspect the stem carefully for corrosion, cracks, or heavy mineral buildup. A moderately worn stem just needs a new washer. A severely damaged stem needs full replacement — bring it to the hardware store to find a match.
Never overtighten any component. Overtightening cracks plastic parts and deforms rubber washers, turning a simple five-dollar repair into an expensive replacement job. Firm and snug is always enough.
Replace the Washer and O-rings
At the bottom of the stem you will find a rubber washer held by a small brass screw. Remove the screw, take out the old washer, and replace it with an exact size match. While everything is apart, inspect the O-rings around the outside of the stem. If they look cracked, stiff, or flattened — replace them too. They cost just cents each. Apply a thin layer of plumber's grease to all new rubber parts before installing. This creates a better seal immediately and significantly extends the life of the components.
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Inspect the Valve Seat
Shine a flashlight into the faucet body and run your finger around the valve seat — the metal surface the washer presses against. It should feel perfectly smooth. If it feels rough or pitted, it will damage new washers very quickly. A mildly rough seat can be resurfaced with an inexpensive seat grinder tool. A severely corroded seat may mean the entire faucet body needs replacement, though this is uncommon in regularly used fixtures.
Reassemble the Faucet
Put everything back in the exact reverse order you disassembled it. Thread the stem back in clockwise, hand-tighten the packing nut first then snug it with your wrench. Replace the handle, tighten the screw, and snap the decorative cap back into place. Give the handle a firm tug to confirm everything is properly secured before turning the water back on.
Turn the Water On and Test
Slowly open the shutoff valves counter-clockwise. Turn the faucet on and off several times and inspect every connection point — the spout, the base of the handle, and the supply line fittings underneath. Run the water for two full minutes while watching carefully. If the faucet is completely dry, you have successfully completed the repair. If a small drip remains at the spout, the washer may not be seated flat — turn the water off, reinstall the washer carefully, and test again. A second attempt resolves the issue in almost every case.
Tips to Prevent Future Leaks
- Close faucet handles gently — never crank them hard. Forcing them destroys washers faster than anything else.
- Clean the aerator screen at the spout tip every six months to prevent mineral buildup and pressure issues.
- Check under sinks monthly. Catching a small drip early prevents expensive cabinet rot and mold growth.
- Keep a small kit of assorted washers, O-rings, and plumber's grease in your toolbox for fast future repairs.
- Consider a water softener if you have hard water — mineral deposits are the biggest cause of early washer failure.
Frequently Asked Questions
❓ How much does a DIY faucet repair cost?
Usually $5 to $25 total for washers, O-rings, or a replacement cartridge. A plumber charges $100 to $250 for the exact same repair. Doing it yourself saves a significant amount every single time.
❓ My faucet leaks from the base, not the spout. Same fix?
A base leak means the O-rings on the exterior of the faucet body are worn rather than the internal washer. The disassembly process is the same but you will target the outer O-rings instead. These cost just a few cents each and come in any assorted O-ring kit at hardware stores.
❓ When should I call a plumber?
Call a plumber if the faucet body itself is cracked or badly corroded, if the leak appears to come from inside the wall, or if anything during the repair does not look right. Hidden pipe leaks cause structural damage and mold and require professional equipment to locate and fix safely.
❓ What if I cannot find matching replacement parts?
Bring the old washer or cartridge to the hardware store for physical matching. Staff are experienced with this. You can also search your faucet brand and model number online — most major brands sell official replacement parts directly. Universal kits covering the most common sizes are available for under $15.
Conclusion
Fixing a leaking faucet is one of the most satisfying home repairs you can do yourself. It takes under an hour, costs almost nothing, and saves you hundreds of dollars in plumber fees and wasted water over the years.
The next time you hear that persistent drip, reach for your toolbox — not your phone. You have everything you need to handle this yourself. 💪