- A faucet dripping once per second wastes 3,000 gallons per year — roughly the equivalent of 180 full showers.
- Buying the wrong replacement part is the leading cause of failed DIY faucet repairs — identifying the faucet type first prevents it.
- Most modern single-handle faucets use a cartridge that lifts out and drops in as one piece — no tools required beyond removing the handle.
The Three Faucet Types — and Why Identification Comes First
Ball faucets have a single lever that moves over a rounded ball-shaped cap — common in older kitchen faucets. They use a complex internal assembly of springs, seats, and O-rings. Cartridge faucets have a single or double handle and use a removable cartridge that controls water flow — the most common modern design and the easiest to repair. Ceramic disk faucets have a wide cylindrical body and a single lever — they rarely fail and when they do, cleaning the disk is usually the full repair. Compression faucets, the oldest type, have two separate handles that must be fully tightened to stop flow — repair requires replacing the rubber washer at the end of the stem.
Buy the part after you remove the old one, not before. Take the cartridge or washer to the hardware store and match it in person — faucet part numbers look identical but the differences are millimeters that matter.
What You Will Need
Adjustable wrench, Phillips and flat screwdrivers, needle-nose pliers, and plumber's grease for reassembly. For cartridge faucets: the replacement cartridge matched to your faucet brand and model. For ball faucets: a repair kit containing springs, seats, O-rings, and a new ball (sold as a complete kit). For compression faucets: replacement rubber washers and screws. Bring the removed part to the hardware store whenever possible.
Step-by-Step Repair for Cartridge and Ball Faucets
Repairing a Ceramic Disk Faucet
Ceramic disk faucets drip when debris or mineral scale prevents the disk from seating fully. After removing the handle and cartridge housing, lift out the disk cylinder. Soak it in white vinegar for 30 minutes to dissolve scale. Rinse thoroughly and inspect the ceramic surface for visible cracks or chips — a cracked disk must be replaced, not cleaned. Reinstall the cleaned disk, reassemble, and test. Ceramic disk faucets that are cleaned and reassembled correctly rarely drip again for years.
When a Plumber Is the Right Call
Call a plumber when: the leak is at the supply line under the sink rather than the faucet itself, the shut-off valve under the sink won't close fully or is itself leaking, the faucet body has a crack rather than a worn internal component, or the faucet is a commercial or specialty type with proprietary parts. Replacing a faucet entirely — as opposed to repairing it — is also within DIY scope for most homeowners and costs $150–$300 in parts for a quality unit.
Apply a thin coat of plumber's grease to all O-rings and rubber parts before reassembly. This prevents O-rings from rolling or tearing during installation and extends the time before the next repair is needed. Ungreased O-rings installed dry fail faster and can shred during tightening.
Recommended methods
Cartridge Replacement
Best OverallPull the worn cartridge, match it to a replacement, and drop the new one in. No tools required beyond handle removal. Solves dripping in most modern single and double-handle faucets in under 30 minutes.
Ceramic Disk Clean
Most NaturalSoak the ceramic disk cylinder in vinegar to dissolve mineral scale that prevents full closure. Reinstall and the drip stops. Only works when the disk is undamaged — inspect for cracks before skipping replacement.
Ball Valve Repair Kit
Most ThoroughReplaces all wearing components in a ball faucet simultaneously: ball, springs, seats, and O-rings. Sold as a complete kit matched to the faucet brand. Extends the faucet life 5–8 years after a full kit replacement.
Frequently asked questions
How do I know what type of faucet I have?
Remove the handle. A single cylindrical component that lifts straight out is a cartridge. A ball-shaped assembly with springs below it is a ball faucet. A ceramic disk cylinder is a ceramic disk faucet. A rubber washer screwed to the end of a threaded stem is a compression faucet.
Can I fix a leaky faucet without turning off the water?
No. Always shut off the supply valves under the sink before removing any faucet components. Failure to do so causes water to spray under pressure when the cartridge is removed. If the under-sink shut-off valves won't close, turn off the main water supply to the house.
Why does my faucet still drip after I replaced the cartridge?
The most common cause is a cartridge installed in the wrong orientation — reversed cartridges seat incorrectly and allow water past the seal. Remove and reinstall confirming the orientation marks face forward. If correct orientation still drips, the seat inside the faucet body may be damaged.
How long does a faucet cartridge last?
5–15 years in most households. High-mineral water accelerates wear. Replacing the cartridge every 7–10 years as preventive maintenance is more cost-effective than waiting for a leak to develop in a high-use kitchen or bathroom faucet.
Is it better to repair or replace a leaking faucet?
Repair if the faucet is less than 10 years old and the body is intact. Replace if it is over 15 years old, parts are unavailable, the body is cracked, or multiple leaks have appeared. A quality replacement faucet installed DIY costs $150–$250 and provides 15–20 years of service.
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