Why is my bathroom sink draining slowly?

The most common cause of a slow-draining bathroom sink is hair and soap scum wrapped around the pop-up stopper or accumulated in the P-trap. Remove the pop-up stopper and clean it, use a plastic zip-tool to extract hair from the drain, and flush with hot water. Do not use chemical drain cleaners—they are ineffective on hair.

How do I unclog a slow-draining kitchen sink?

A slow-draining kitchen sink is usually caused by food debris, coffee grounds, or grease in the P-trap. Remove visible debris from the basket strainer, run hot water and dish soap for 30-60 seconds to dissolve grease, and use a plastic zip-tool if needed. If the sink continues draining slowly, the P-trap must be disassembled and cleaned by a plumber.

Should I use chemical drain cleaners for a slow drain?

No, do not use chemical drain cleaners for a slow drain. Chemical drain cleaners are ineffective on mechanical obstructions like hair and food debris, can damage pipes, create hazardous fumes, and pose a chemical burn risk if the drain is completely blocked. Use mechanical methods: remove the pop-up stopper, use a plastic zip-tool, and flush with hot water.

When should I call a plumber for a slow drain?

Call a licensed plumber if the sink continues draining slowly after clearing the pop-up stopper and using a zip-tool, if water is completely backed up, if multiple drains are slow or gurgling, if you smell sewage, or if water backs up into other fixtures. These indicate a deeper obstruction in the branch drain line or a main line issue.

Plumbing

Slow Draining Bathroom or Kitchen Sink

PropSWOT Team

January 7, 2025

6 min read

Cite This Article

PropSWOT Team. "Slow Draining Bathroom or Kitchen Sink." PropSWOT Resources, January 7, 2025. Available at: https://tenant.propswot.com/resources/slow-draining-sink

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