Fix a Leaky Kitchen Faucet Step by Step

The most common mistake people make: they buy parts before diagnosing the faucet type. There are four main types — ball, cartridge, ceramic disc, and compression — and each has a completely different fix. Identify yours first or you will buy the wrong repair kit.

Step 1 — Identify Your Faucet Type

• Single handle that rotates in an arc: Ball faucet (common in kitchen)
• Single or double handle that lifts and turns: Cartridge faucet
• Single handle, rarely leaks, wide base: Ceramic disc
• Two handles, older home: Compression faucet

Step 2 — Shut Off the Water

1. Turn off the shut-off valves under the sink (clockwise until firm)
2. Open the faucet to release pressure and drain remaining water
3. Plug the drain so small parts do not fall in

Step 3 — Disassemble and Inspect

1. Remove the handle — pry off the decorative cap, unscrew the screw underneath
2. Pull out the cartridge or ball assembly
3. Inspect O-rings, washers, and seals — if cracked, dried, or flattened, that is your leak

Step 4 — Replace the Right Parts

• Ball faucet: Replace the ball, springs, seats, and O-rings — buy a brand-matched repair kit
• Cartridge: Pull out the cartridge and replace it entirely — bring the old one to the hardware store to match it
• Ceramic disc: Clean the disc with white vinegar; replace only if cracked
• Compression: Replace the rubber washer at the bottom of the stem — costs under $2

Step 5 — Reassemble and Test

1. Wrap threaded connections with plumber's tape (2-3 wraps)
2. Reassemble in reverse order
3. Slowly turn the water back on and check for drips

When to call a plumber instead: If the faucet body itself is cracked, if the leak is at the base of the spout (valve seat damage), or if pipes behind the wall are involved — those require professional repair or full faucet replacement.

Pro tip: Take your old cartridge or washer to a Home Depot or Canadian Tire and match it physically — do not rely on the brand name alone, since manufacturers often change internal parts across production runs without updating model numbers.