Why fix a leaky faucet
A leaky faucet wastes water and can raise your utility bill. Fixing a small leak is usually quick and inexpensive when you know the basic steps.
This guide explains how to fix a leaky faucet, lists tools and parts, and shows a simple step-by-step repair for common faucet types.
Tools and parts to fix a leaky faucet
Before you start, gather the right tools and parts. Having everything ready shortens repair time and reduces frustration.
- Adjustable wrench or basin wrench
- Screwdrivers (flat and Phillips)
- Replacement parts: O-rings, washers, cartridges, or valve seats
- Plumber’s grease and thread seal tape
- Rag or towel and a small container for parts
Identify the faucet type
Knowing the faucet type helps you choose the correct replacement parts. The most common types are:
- Compression faucets (two handles, uses washers)
- Cartridge faucets (single or double handle, replace cartridge)
- Ball faucets (single handle, ball assembly inside)
- Ceramic disc faucets (single or double handle, replace disc)
Step-by-step: How to fix a leaky faucet
Follow these steps to fix most household leaks. Keep paragraphs short and test the faucet at each stage.
1. Turn off water and cover drain
Locate the shut-off valves under the sink and turn them clockwise until snug. If there are no local shut-offs, turn off the main water supply.
Plug the drain or place a rag in it to prevent small parts from falling down.
2. Remove handle and inspect
Use a screwdriver or Allen key to remove the handle. Look for visible wear on O-rings, washers, or seals. Note the order of parts as you remove them; taking a quick photo helps at reassembly.
3. Replace worn washers or O-rings (Compression faucets)
For compression faucets, a worn rubber washer is a common cause. Remove the stem and replace the washer at the base of the stem.
Use plumber’s grease on the new washer’s face and reassemble. Test the faucet after reassembly.
4. Replace cartridge or ball assembly (Cartridge or Ball faucets)
If you have a cartridge or ball faucet, remove the retaining clip and pull out the cartridge or ball assembly. Take the old part to a hardware store to match a replacement if unsure.
Install the new cartridge or ball following the manufacturer’s orientation marks. Apply silicone-based plumber’s grease to O-rings before reassembly.
5. Re-seat valve seats or clean mineral buildup
Hard water can cause mineral deposits that prevent a tight seal. Inspect valve seats and clean with vinegar or a seat grinder if needed. Replace seats if they are pitted or damaged.
6. Reassemble and test
Reassemble the faucet in reverse order. Turn the water back on slowly and check for leaks. Test both hot and cold sides and listen for drips for a few minutes.
Troubleshooting after repair
If the faucet still leaks after replacing obvious parts, try these checks:
- Verify the replacement part matches the original exactly.
- Check that O-rings and seals are lubricated and seated correctly.
- Ensure valve seats are clean and free of debris.
- For persistent leaks, the entire faucet assembly may need replacement.
A faucet that drips one drop per second can waste roughly 3,000 gallons of water a year. Fixing leaks saves water and money.
Example case study: Fix a leaky faucet in 30 minutes
Homeowner Maria noticed a steady drip from her kitchen cold tap. She identified the faucet as a compression type, bought two replacement washers and a new seat washer for $9.
Maria turned off the shut-offs, removed the handle, replaced the worn washer, cleaned the valve seat, and reassembled the faucet. The repair took about 30 minutes and stopped the leak entirely.
Result: No more drip, estimated water savings of several hundred gallons the first year, and a low out-of-pocket cost.
When to call a professional
Call a plumber if you face any of these situations:
- Water supply lines leak or burst
- Corroded valve seats or fixtures that won’t disassemble
- Repeated leaks after multiple repair attempts
- Complex faucets with hidden fasteners or manufacturer-specific parts
Final tips to prevent future leaks
- Avoid overtightening handles; this wears washers faster.
- Clean aerators and screens to maintain flow and reduce pressure buildup.
- Use a water softener if you have very hard water to reduce mineral buildup.
- Schedule an annual check of visible fixtures and shut-off valves.
Fixing a leaky faucet is usually a straightforward DIY task that saves water and money. With the right tools, parts, and a careful approach, most leaks can be resolved in one short visit to the sink.