Symptoms
- Drip from the spout or leak at the base
- Cabinet under the bar sink is damp
- Faucet is a compact or single-hole design with limited room to work
- Leak appeared gradually over time
Likely causes
- CommonWorn cartridge or washerSame wear pattern as any other faucet, just in a smaller body.
- CommonLoose supply line connection in a tight cabinetCompact installs are more prone to slightly under-tightened fittings.
- PossibleWorn O-ring at the baseCommon on compact single-hole faucets.
- PossibleLow-quality compact faucet componentsSome bar faucets use smaller, less durable internal parts.
What to do
- Turn off the water supply under the bar sink; access may be tight, so use a flashlight and mirror if needed.
- Dry the area and run the faucet to spot the exact leak location.
- For a supply line leak, tighten the connection with a basin wrench designed for tight spaces.
- For a spout or handle leak, remove the handle to access the cartridge or washer, following the same process as a kitchen faucet.
- Replace the worn cartridge, washer, or O-ring with an exact match for the model.
- Reassemble carefully given the limited space, then restore water and check closely for leaks.
- If the tight cabinet makes access very difficult, consider removing the faucet fully to work on it on a countertop, then reinstalling.
Tools and parts
- Basin wrench
- Flashlight
- Adjustable wrench
Bar faucet cartridge or washer kitSearch: “bar faucet cartridge replacement kit”
When to call a pro
Call a plumber if cabinet space is too tight to work safely or the leak source isn't clear.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.