Why Is My Faucet Dripping Nonstop?

Published September 2026 · Pro Plumber Laveen AZ

A dripping faucet is more than an annoyance — it wastes water and signals that internal components need attention. Here are the most common causes and what to do about them.

Common Causes of a Dripping Faucet

1. Worn Cartridge or Washer

Every faucet has a mechanism that controls water flow. In cartridge-style faucets, the cartridge wears out over time. In compression faucets, the rubber washer deteriorates. Either way, the seal fails and water seeps through even when the handle is fully closed.

2. Damaged O-Ring

O-rings create watertight seals around the faucet stem. When they crack, flatten, or harden — which happens faster with Laveen's hard water and mineral deposits — the faucet drips from around the handle.

3. Corroded Valve Seat

The valve seat connects the faucet body to the spout mechanism. Mineral buildup from hard water can corrode the valve seat, creating an uneven surface that prevents a proper seal.

4. Hard Water Mineral Buildup

Laveen's water supply has high mineral content. Over time, calcium and magnesium deposits build up on internal faucet components, interfering with proper operation and accelerating wear.

5. Water Pressure Issues

If your faucet only drips at certain times of day, high water pressure may be forcing water past weakened seals. A pressure regulator issue could be the root cause.

When to Call a Plumber

A single dripping faucet often leads to discovering more significant issues. Call a faucet repair professional if:

• The drip persists after you've tightened the handle
• Multiple faucets are dripping (possible pressure issue)
• You see corrosion or mineral buildup around the base
• The faucet handle is difficult to turn or feels loose
• Water is leaking under the sink

Don't let a drip become a bigger problem. Call (602) 404-6039 to connect with a local Laveen plumber.