Why Does My Faucet Drip Even When It’s Turned Off?

A faucet that keeps dripping after you turn it off usually means one of its internal parts is no longer sealing properly. Worn cartridges, washers, O-rings, seals, or valve components are common causes. Even a slow drip can waste water over time and may eventually become more noticeable.
Before buying replacement parts, identify the faucet brand and model so the correct components are used. Ally Plumbing helps Bellevue homeowners diagnose dripping faucets and determine whether the fixture can be repaired or if replacement would be more practical.
If water is leaking beneath the sink, around the faucet base, or from a shutoff valve that will not close, have the plumbing inspected promptly. These problems can lead to cabinet damage, moisture buildup, or a larger leak.
Common Reasons a Faucet Keeps Dripping

Worn Faucet Cartridge
Many modern faucets use a cartridge to control water flow and temperature. Over time, the cartridge can wear out, become damaged, or develop mineral buildup.
When the cartridge no longer seals correctly, water may continue dripping from the spout even when the handle is fully closed.
Damaged Washers or Seals
Some faucet designs rely on rubber washers and seals to stop water flow. These components can harden, crack, or wear down after repeated use.
A damaged washer may allow a steady drip each time the faucet is turned off. Replacing the worn component can often restore a proper seal.
Worn O-Rings
O-rings help seal moving parts inside certain faucet assemblies. If an O-ring deteriorates, you may notice dripping near the handle or water collecting around the faucet body.
The correct replacement size matters, which is why knowing the faucet model can make repairs easier.
Valve Seat Problems
The valve seat connects internal faucet components to the spout. Mineral deposits, corrosion, or wear can prevent a tight seal.
If replacing a washer or cartridge does not solve the problem, the valve seat may need to be inspected.
Signs a Dripping Faucet Needs Professional Repair
A minor drip may seem manageable, but professional help may be appropriate if you notice:
- Water leaking beneath the fixture
- Moisture around the faucet base
- A shutoff valve that will not close
- Constant dripping after parts are replaced
- Corrosion around plumbing connections
- Water damage inside the cabinet
Leaks underneath the fixture are especially important to address because they can damage cabinetry and nearby materials.
Can You Repair a Dripping Faucet Yourself?
Some faucet repairs are straightforward if the correct replacement parts are available. Start by identifying the manufacturer, model, and faucet type.
Before disassembling anything, make sure the shutoff valves work properly. If a valve will not close or begins leaking, stop and contact a plumber rather than forcing it.
Older or specialty faucets may also require specific tools or parts that are not interchangeable.

How Much Does Faucet Repair Cost in Bellevue?
Faucet repairs generally cost a few hundred dollars, depending on the fixture, failed component, required parts, and accessibility.
A cartridge or washer replacement may be relatively simple, while repairing shutoff valves or replacing an older faucet can involve additional work.
Get Faucet Repair in Bellevue
If your faucet keeps dripping after it is turned off, addressing the cause can help reduce water waste and prevent larger leaks.
Ally Plumbing provides faucet repair and plumbing service for Bellevue homeowners. Call (844) 669-ALLY to schedule service and get your dripping faucet properly diagnosed and repaired.

