Plumbing • RepairRiot

Bathroom Sink Troubleshooting & Repair Guides

Find the closest bathroom sink plumbing symptom and open the guide that matches what is happening before you take things apart or replace parts.

Find The SymptomCheck SafelyFix The Right Problem
Bathroom Sink plumbing repair scene

Find your bathroom sink problem

Start with the symptom you can see. If water is active, shut it off first, then use the guide that matches the first thing that went wrong.

Draining and backups

Bathroom sink not draining

Water stands in the basin or drains very slowly.

Bathroom sink slow draining

The drain is sluggish but not fully blocked.

Bathroom sink backs up overnight

Water or residue returns after the sink sits unused.

Leaks under the sink

Bathroom sink leaking

Water shows up around the basin, faucet, drain, or cabinet.

Bathroom sink leaking under sink

Water collects inside the vanity cabinet.

Bathroom sink drain leaking

The leak is at the drain, flange, trap, or slip joint.

Faucet and pressure

Cold water pressure low

Cold flow is weak at the bathroom sink.

Hot water pressure low

Hot flow is weak or slow at the bathroom sink.

Sink not getting hot water

The sink stays cool or takes too long to warm up.

Overflow, smells, and sounds

Bathroom sink overflowing

Water rises too high or spills over the basin.

Bathroom sink smells bad

Odor comes from the drain, overflow, or cabinet.

Bathroom sink gurgling

Gurgling points to drain or vent behavior.

More Plumbing topics

Kitchen Sink

Kitchen Sink

Toilet

Toilet

Shower

Shower

Bathtub

Bathtub

Faucet

Faucet

Drain / Sewer

Drain / Sewer

Sump Pump

Sump Pump

Well Pump / Pressure Tank

Well Pump / Pressure Tank

Water Pressure

Water Pressure

Shutoff Valves

Shutoff Valves

Frozen Pipes

Frozen Pipes

Sink Components

Sink Components

Pipes / Fittings

Pipes / Fittings