Why Is Your Faucet Leaking from the Base?

A faucet leaks from the base when the O-ring or cartridge seal wears out after 5 to 8 years of use. Temperature swings in the humid subtropical climate with four distinct seasons speed up this wear in Montgomery County homes.

Common Causes in Local Homes

Hard water minerals build up around the base and break down rubber seals. Homes in Kentlands and Lakelands often see this after repeated winter freezes and summer humidity cycles. The packing nut can also loosen from vibration when pipes expand and contract.

Check for water pooling right at the faucet base rather than the spout. Turn the handle and watch for drips that start only when the water runs. This pattern points to base seals, not the aerator.

Step-by-Step Diagnosis

Shut off water at the supply valves under the sink. Remove the handle and unscrew the retaining nut. Inspect the O-ring for cracks or flattening. Replace any seal that no longer feels flexible.

Test the cartridge by pulling it straight up. Look for scoring on the sides. If the cartridge shows wear, replace the entire unit rather than just the ring.

Risks of DIY Repairs

Overtightening the packing nut cracks the faucet body and creates new leaks. Using the wrong size O-ring lets water bypass the seal within weeks. Property owners in Washingtonian Center and Quince Orchard have reported floor damage after repeated attempts.

Old shutoff valves under the sink can seize. Forcing them risks a larger flood. See the guide Where is My Main Water Shut-Off Valve? A Gaithersburg Homeowner Guide before starting work.

When to Call a Professional

Persistent leaks after seal replacement usually mean the faucet body itself has corroded. A full leaking faucet repair includes new supply lines and proper torque on all connections. Technicians at Safe Pipe Plumber, based at 200 Girard St, Gaithersburg, MD 20877, handle these jobs Monday through Friday 8am to 6pm and Saturday 9am to 2pm.