Leaking Faucet — How to Stop a Dripping Faucet for Good

Common Symptoms

• Constant drip from the spout even when the faucet is fully off
• Water leaks around the base of the handle when running
• Water dripping under the sink from the supply connections
• Squeaking or stiff handles that are difficult to turn
• Visible water staining in the sink or mineral deposits around the spout

Most Likely Causes

1. 1

   Worn Cartridge (Cartridge Faucet — Most Common)

   Single-handle and two-handle cartridge faucets use a replaceable cartridge that controls water flow and temperature. When it wears out, water leaks past when the faucet is off. Replace with the exact same cartridge — bring the old one to the hardware store or search by your faucet brand and model number.

2. 2

   Worn O-Rings or Springs (Ball Faucet)

   Ball faucets (single-handle with a rotating ball mechanism, common in kitchens) use O-rings, springs, and valve seats that wear over time. Full repair kits are available for $12–$20 and include all necessary components. Delta and Moen ball faucet kits are the most widely available.

3. 3

   Worn Seat Washer (Compression Faucet)

   Older two-handle faucets use a rubber seat washer compressed against a brass valve seat to stop water flow. Over time this washer wears down or hardens. Replacing it requires removing the handle and packing nut to access the stem — the washer is a rubber disc held by a brass screw at the bottom of the stem.

4. 4

   Cracked Ceramic Disc (Ceramic Disc Faucet)

   Many modern and high-end single-handle faucets use ceramic disc cartridges. These are very durable but can crack from impact or be damaged by sediment. Replacement discs or cartridges are available but can be more expensive ($20–$60). Cleaning the discs with white vinegar often resolves minor leaks caused by mineral buildup.

Quick DIY Checks

1. 1Shut off the water supply before disassembling anything. Under most sinks there are two supply valves (hot and cold) — turn them clockwise until they stop. Turn on the faucet to release pressure and confirm the water is fully off.
2. 2Identify your faucet type: single-handle lever = likely cartridge or ball type; two-handle round knobs = likely compression type; single smooth-handle = likely ceramic disc. This determines which repair kit you need to buy.
3. 3Remove the handle (usually one screw hidden under a decorative cap on top). For cartridge faucets, pull the cartridge straight up with pliers — photograph it first to note the exact orientation before removing.

1. 4Bring the old cartridge or washer to the hardware store to find an exact replacement. Cartridges are often brand-specific (Moen, Delta, Price Pfister, Kohler) — the right part ensures a proper seal and long life.
2. 5Apply a thin coat of plumber's grease to new O-rings and the cartridge body before installing. Turn the water back on slowly and test for leaks before fully reassembling the handle and decorative cap.

Repair vs Replace

Recommended Tools & Parts

• Moen 1225 Cartridge Replacement

  OEM Moen cartridge for Moen single-handle faucets. The most widely-needed cartridge in the US — fits many Moen kitchen and bathroom models.

  $12–$25

  Buy on Amazon →

• Universal Faucet Repair Kit

  Includes O-rings, seat washers, packing, and springs for compression and ball faucet repair. Works with most standard faucet brands.

  $8–$15

  Buy on Amazon →

• Delta Ball Faucet Repair Kit

  Complete repair kit for Delta ball-type kitchen faucets. Includes ball, springs, seats, O-rings, and cam assembly to stop all types of leaks.

  $12–$20

  Buy on Amazon →

• Silicone Plumber's Grease

  Silicone-based grease for lubricating O-rings, cartridges, and valve stems. Extends the life of rubber components and prevents squeaking handles.

  $5–$10

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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