Plumbing

BuildingWrench repair guide

Plumbing

Commercial Faucet Dripping: Cartridge and Washer Troubleshooting

A faucet that drips after shutoff usually has a worn cartridge, stem washer, seat, seal, or debris preventing a seal. Identify the faucet type before disassembly.

Last reviewed 2026-09-12 · General facility-maintenance information, not a substitute for site procedures, manufacturer instructions, codes, or qualified professional judgment.

Routine facility fixSkill: Beginner-friendlyFormat: Diagnose → Fix → Test
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Safety boundary

Isolate water before opening pressurized components. Follow manufacturer instructions and sanitary precautions.

Full troubleshooting steps are in Pro

The safety boundary, quick answer and stop-work conditions above stay free. Pro opens the likely causes, symptom table, step-by-step procedure and preventive maintenance for this guide.

Stop and call a licensed professional when

  • Supply stops do not hold
  • Faucet body is cracked
  • Cartridge is seized badly enough to risk breaking the body

Mistakes, FAQ, parts and tools

Pro opens the rest of this guide: common mistakes, field FAQ, the parts list, and the tools for the job.

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Commercial Faucet Has Low Water Pressure? Check These First

If only one faucet has weak flow, the restriction is usually local. Start with the aerator, then verify the stops are open and inspect supply hoses, inlet screens, and the cartridge before escalating.

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P-Trap Leaking Under a Commercial Sink: How to Find and Fix the Leak

A leaking sink trap is usually caused by a loose slip joint, crooked washer, cracked nut, damaged tubular piping, or a partial clog that makes joints seep. Dry everything first, then run water and identify the first point that gets wet.