The most common causes of a leaking bathroom faucet are worn cartridges or washers, mineral buildup on the valve seat, damaged O-rings, corroded supply lines, loose handle assemblies, and high water pressure (above 80 PSI) that wears parts faster than normal.
Top causes
- Worn or damaged cartridge
- Failed O-ring at handle base
- Mineral buildup on valve seat
- Loose handle screw
- Corroded supply line
- High water pressure (above 80 PSI)
We diagnose and repair in one visit, usually 30–60 minutes. Schedule via bathroom faucet service. If pressure is over 80 PSI, also see PRV repair.
