A faucet dripping once per second wastes roughly 3,000 gallons of water per year. Beyond the waste, the constant moisture accelerates rust in your sink basin and can eventually damage the faucet seat beyond a cheap fix. The good news: the overwhelming majority of leaky faucets require only a $5–15 part and about 30 minutes.
What changed in 2026
- Universal cartridge kits are now stocked at most hardware stores — you no longer need to call the manufacturer for obscure replacement parts on faucets made in the last 15 years.
- Quarter-turn ceramic disc faucets now dominate new construction; they are the most durable type and rarely leak, but when they do the ceramic disc is the culprit.
- Video repair guides exist for virtually every faucet model by name — searching "[faucet brand + model] repair" on YouTube before starting gives you a model-specific walkthrough.
Identify your faucet type
| Type |
How to identify |
Most common failure |
| Ball faucet |
Single handle that rotates over a dome |
Worn ball, O-rings, springs |
| Cartridge (single) |
Single lever side-to-side or up/down |
Cartridge O-rings or whole cartridge |
| Cartridge (double) |
Two separate handles, smooth turn |
Cartridge per handle |
| Compression |
Two handles, stiff to turn |
Rubber washer on the stem |
| Ceramic disc |
Single lever, very smooth |
Ceramic disc or mineral buildup |
Getting this right before you start saves a wasted trip to the hardware store.
Tools you need
- Adjustable wrench or basin wrench
- Flathead and Phillips screwdrivers
- Needle-nose pliers
- Allen/hex key set (for set screws under handle caps)
- Plumber's grease (silicone-based)
- Replacement parts (see per-type guide below)
- Towels or a small bucket
How to turn off the water
Before anything else: look under the sink for the shutoff valves — one for hot, one for cold. Turn them clockwise until closed. Turn on the faucet to drain residual pressure. If there are no under-sink valves (older homes), turn off the main house supply.
How to fix each faucet type
Compression faucet (two handles, older homes)
- Remove handle cap (pry off with flathead), unscrew the handle screw.
- Use a wrench to unscrew the packing nut, then pull out the stem.
- At the bottom of the stem is a rubber washer held by a brass screw.
- Replace the washer with an exact match — take it to the store.
- Replace the O-ring on the stem while you are in there.
- Coat new parts with plumber's grease, reassemble in reverse order.
Cartridge faucet (most common in 2026 homes)
- Remove the decorative cap, unscrew the handle screw, pull off the handle.
- Remove the cartridge retaining clip (a small U-shaped metal clip) with needle-nose pliers.
- Pull the cartridge straight up and out — note its orientation.
- Take it to the hardware store for an exact replacement, or order by model number.
- Insert the new cartridge in the same orientation.
- Reassemble and test — if hot and cold are reversed, rotate the cartridge 180°.
Ball faucet (single rotating handle)
- Remove the cap and handle, then unscrew the collar with a wrench.
- Lift out the ball assembly — note all positions before disturbing.
- Most ball faucet kits include a replacement ball, springs, rubber seats, and O-rings — replace all of them.
- Seat springs go in point-down; replace seats with the kit tool or a flathead.
- Reassemble: seats, springs, ball, collar, handle.
Ceramic disc faucet
- Remove handle, unscrew the disc cylinder from the faucet body.
- Remove the ceramic disc — inspect for cracks.
- If cracked: replace with an exact match (brand and model specific).
- If not cracked: the issue is mineral scale. Clean the disc with white vinegar, rinse thoroughly.
- Reassemble — ceramic discs are fragile; do not overtighten.
How to pick replacement parts
The single most important step: take the old part with you to the hardware store. Sizes and configurations vary enormously. If you buy by guessing, you will likely get the wrong fit.
Second option: photograph the part with a ruler for scale, and note the faucet brand and model (usually stamped on the faucet body or listed on the original receipt/permit).
Common mistakes
Not turning off the supply valve. You will flood the cabinet. It happens constantly. The valve is under the sink; take 10 seconds to turn it.
Forcing handles. Most handles have hidden screws under decorative caps. Prying without removing the screw strips the handle and damages the stem.
Guessing washer sizes. A washer 1mm too large will not seat properly and the drip returns within days.
Reassembling without plumber's grease. Dry rubber parts degrade rapidly. A thin coat of silicone grease extends part life significantly.
Overtightening. Ceramic discs crack; O-rings deform. Snug is the target — you are not torquing an automotive bolt.
What to skip
- Replacing the entire faucet for a drip — 90% of drips are a $5–15 washer or O-ring. Only replace the faucet if the body is cracked or the valve seat is irreparably damaged.
- Teflon tape on compression washers — Teflon tape is for threaded pipe connections, not for rubber-seated valves.
- Penetrating oil inside the faucet body — it contaminates drinking water supply lines.
FAQ
How do I know if the faucet seat is damaged?
Run your finger around the valve seat (the brass ring the washer presses against). If it is rough, pitted, or grooved, the seat needs refacing with a seat dresser tool or replacing. This is still a DIY repair.
The faucet leaks at the base of the spout, not the tip. What is that?
That is usually O-rings on the faucet body failing, not a washer issue. The fix is similar — disassemble, replace the O-rings at the base, reassemble.
How long should a repair last?
A correct washer or cartridge replacement in an average-use faucet should last 5–10 years.
My water pressure seems lower after the repair. Why?
Check that the aerator (the small screen at the tip of the spout) is not clogged. Reassembly can dislodge scale into the aerator — unscrew it and rinse.
Where to go next
For related home repairs, see How to unclog a drain in 2026, How to hang a shelf in 2026, and How to clean your house fast in 2026.