What Causes A Bathroom Sink Faucet To Drip

What Causes a Bathroom Sink Faucet to Drip?

A dripping bathroom sink faucet is a common household annoyance that can waste water and increase your utility bills. While it may seem like a minor issue, it's important to address a dripping faucet promptly to prevent further damage and costly repairs.

There are several potential causes for a dripping bathroom sink faucet. Here are some of the most common:

Loose Washer or O-Ring

The washer or O-ring is a small rubber seal that prevents water from leaking around the handle or spout of the faucet. Over time, these seals can become worn or damaged, leading to a drip. Replacing the washer or O-ring is a relatively simple repair that can be done by most homeowners.

Damaged or Corroded Valve Seat

The valve seat is the part of the faucet that makes contact with the washer or O-ring to create a seal. It can become damaged or corroded over time, causing the faucet to drip. Repairing a damaged valve seat typically requires replacing the entire faucet.

Faulty Cartridge

Many modern faucets use a cartridge instead of a washer or O-ring to control water flow. If the cartridge becomes worn or damaged, it can cause the faucet to drip. Replacing the cartridge is a more complex repair that may require professional assistance.

Mineral Buildup

Minerals in water can build up on the faucet's aerator, restricting water flow and causing it to drip. Removing the aerator and cleaning it regularly can help prevent this buildup.

Leaking Connections

The connections between the faucet and the water supply lines can also leak over time. If you notice water leaking from the base of the faucet, it's likely due to a loose or damaged connection. Tightening the connections or replacing the water supply lines can resolve this issue.

High Water Pressure

Excessive water pressure can put stress on the faucet and its components, leading to leaks. If you have high water pressure in your home, installing a water pressure regulator can help reduce the pressure and prevent dripping faucets.

Other Possible Causes

Less common causes of a dripping bathroom sink faucet include a clogged aerator, a cracked faucet body, or a damaged handle. If you've ruled out the more common causes, it's best to consult a professional plumber for further diagnosis and repair.