How to Fix a Leaky Faucet Yourself, No Plumber Required

A dripping faucet is not a plumbing problem. It is a worn washer, a worn O-ring, or a worn cartridge, and every one of those is a five to fifteen dollar part that requires nothing more than an adjustable wrench and a screwdriver to replace. A plumber charges one hundred fifty to three hundred dollars for this exact job. The part itself costs less than a fast food lunch.

If you want to know how to fix a leaky faucet without handing money to someone else, this is the whole process. It takes twenty to thirty minutes, it works on the two most common faucet types in American homes, and the only way to get it wrong is to skip the first step.

How much water a dripping faucet actually wastes

A faucet dripping at a rate of one drop per second wastes approximately three thousand gallons per year. That is enough water to fill a backyard swimming pool. On your water bill, that translates to somewhere between forty and one hundred twenty dollars of wasted water depending on your local rates, and that is before you consider what it costs when the drip is coming out of a hot faucet that the water heater is paying to warm.

So the faucet is costing you money three different ways. The water itself, the energy to heat it if it is a hot leak, and the eventual call to a plumber if you keep putting it off. The fix is cheaper than any of those individual costs.

Identify what kind of faucet you have

There are two common types in residential homes, and the repair is slightly different for each. Compression faucets are the older two-handle style, one handle for hot, one for cold, each one tightening clockwise against a seat to stop the water. If your faucet handles tighten visibly when you shut them off and there is clear mechanical resistance, it is almost certainly a compression faucet. These are mostly found in homes built before 1990 or in older bathroom sinks that have not been replaced.

Cartridge faucets are the most common type in homes built after 1990. These can be single-handle or double-handle. The tell is that the handle moves smoothly without any hard stop and without tightening. The entire internal mechanism is one replaceable cylinder called a cartridge. Kitchen faucets with a single lever are almost always this type.

Ball faucets and ceramic disc faucets exist too, and the concepts here apply, but compression and cartridge cover the vast majority of home faucets. If your faucet does not look like either of those, the general approach still works, you just replace different internal parts.

Which handle is actually leaking

For a two-handle faucet, you need to know which side is the culprit before you start swapping parts. Reach under the sink and find the two supply valves. Turn off the hot side only, leave the cold on, and check whether the drip stops. If it does, the hot side is the problem. If it keeps dripping, turn the hot back on, shut off the cold, and test again.

For a single-handle cartridge faucet, there is only one internal component, so this step does not apply. The cartridge handles both hot and cold, and a drip on either means the cartridge is done.

Once you know what you are replacing, the fix takes about twenty minutes.

The repair process for a compression faucet

Turn off both supply valves under the sink. Turn on the faucet to flush any remaining pressure and confirm the water has stopped. Pop off the decorative cap on top of the handle, usually labeled H or C, by prying gently with a flathead screwdriver. Remove the screw underneath, pull the handle straight up and off.

Now you are looking at the packing nut, a large brass or chrome hex nut. Use an adjustable wrench to loosen it counterclockwise and remove it. Pull out the stem, which is the cylindrical part underneath. On the very bottom of the stem is a small rubber washer held in place by a brass screw. That washer is the most likely culprit. If it is cracked, flattened, or dried out, that is your drip.

Remove the old washer by unscrewing the brass screw, take the old washer and the stem with you to a hardware store, and match the washer exactly. Do not guess. Washers come in slightly different sizes and shapes, and the wrong one will not seal. While you are there, it is worth replacing the O-ring around the stem too, since it is a fifty-cent part and it has probably dried out as well.

Install the new washer and O-ring, slide the stem back into place, thread the packing nut back on by hand, tighten it with the wrench until snug, replace the handle, turn the supply valves back on slowly, and test. The drip should be gone.

The repair process for a cartridge faucet

Turn off both supply valves, flush the pressure, and remove the handle. The handle on a cartridge faucet usually has a setscrew hidden behind a decorative cap on the side, which is different from a compression faucet. Locate the screw, remove it, and lift the handle off.

Underneath is the cartridge itself, held in place by either a retention clip (a U-shaped metal piece) or a large retaining nut. If it is a clip, pull it straight out with pliers. If it is a nut, loosen it with a wrench. Then pull the cartridge straight up. It can be stuck, especially in a faucet that has not been serviced in years. A pair of pliers with a gentle side-to-side wiggle usually breaks it loose.

Look at the cartridge. The brand and model are often stamped into the side or the top. Take the old cartridge to the hardware store and match it exactly. This is where people waste time. A cartridge that looks close is not close. The dimensions and internal ports are precise, and the replacement has to be from the same family. Moen, Delta, Kohler, Pfister, and Price Pfister all use different cartridge designs and they are not interchangeable.

Install the new cartridge in the same orientation as the old one, replace the retention clip or nut, reinstall the handle, turn the supply valves back on, and test.

The tools you actually need

An adjustable wrench, a flathead screwdriver, a Phillips screwdriver, and a pair of needle-nose pliers will handle almost every faucet repair. A basic HOTO Tools adjustable wrench and screwdriver set covers this in one purchase for around twenty-five to forty dollars, and the tools pay for themselves on the first repair. If your household tool kit is thin, this is the investment to make, and it is also what you need for the rest of the articles in our best home tool kit for beginners breakdown.

For the replacement parts themselves, a universal faucet repair kit from Amazon covers most compression faucet washer sizes and O-rings for about fifteen dollars. If you have a cartridge faucet, skip the kit and buy the specific cartridge your faucet takes, which will be in the ten to thirty dollar range depending on brand.

The money difference, in plain numbers

Parts for a washer replacement: five to ten dollars. Parts for a cartridge replacement: ten to thirty dollars. Tools, if you do not have them: twenty-five to forty dollars but they last forever. Your time: twenty to forty minutes depending on how easily the old parts come out.

A plumber for the same job: one hundred fifty dollars minimum in most markets, frequently two to three hundred dollars once you factor in a service call fee, parts markup, and labor. That is a difference of one hundred to two hundred seventy-five dollars for thirty minutes of your time.

This is the kind of number that adds up over a year. Small household repairs that get put off turn into paid service calls, and the service calls accumulate into meaningful money. The Broke Mom 30-Day Home Reset walks through this directly for seventeen dollars and covers the fixes that have the best return on time, which includes this one. It is worth the price once if you are staring at a list of small house problems that have been undone for months.

Other small plumbing fixes that work the same way

The same principles apply to the other common household water fixes. A running toilet is usually a ten-dollar flapper replacement that takes fifteen minutes. The exact walkthrough is in how to fix a running toilet and it follows the same pattern: shut off water, remove worn part, match exactly, install, test.

A shower caulk line that has gone black and moldy, the same pattern. Remove the old, clean the surface, apply the new, let it cure. That one is covered in how to caulk a bathtub and takes an hour of actual work.

A squeaky floor, same principle, different tools, different parts, same structure. The fix is in how to fix squeaky floors. All of these fit in a regular homeowner’s spring home maintenance checklist, and tackling them in one weekend changes the feel of a house more than most remodeling projects.

If the drip does not stop after the repair

Three things to check. First, make sure you matched the washer or cartridge exactly. A close size but not the right size does not seal. Second, make sure the packing nut or cartridge retention nut is tight but not overtightened. Overtightening can distort the seat and cause a different leak. Third, check the valve seat itself. On a compression faucet, the metal seat the washer presses against can become pitted over years of use. You can either reseat it with a seat dressing tool (cheap, ten dollars) or replace it, which is a slightly more involved fix.

Ninety percent of the time, the washer or cartridge swap fixes the problem outright. If it does not, the seat is usually the issue on older faucets.

With the drip fixed, the next thing worth doing this weekend is building the small project that produces the best return on a few hours of weekend work. That one is outside.