Why is my drain overflowing

PlumbingUpdated March 2026

The answer to 'why is my drain overflowing' is that the drain is likely clogged, causing water to back up and overflow. Common causes of a clogged drain include hair, soap scum, food particles, and other debris buildup. Symptoms include slow draining, gurgling sounds, and water rising up in the sink or tub when other fixtures are used.

If the clog is minor, you may be able to clear it yourself using a plunger, drain snake, or chemical drain cleaner. However, if the clog is severe or the problem persists, it's best to call a professional plumber. They have the tools and expertise to thoroughly clear the blockage and identify any underlying issues that may be causing the drain to overflow.

Sources

Plumbing Manufacturers International— authority

International Association of Plumbing and Mechanical Officials— authority

DIY Network— guide

Step-by-Step Guide

1
Try a plunger
Use a plunger to try and dislodge the clog. Firmly place the plunger over the drain opening and plunge up and down several times.
2
Use a drain snake
If the plunger doesn't work, use a drain snake (also called a plumber's snake or auger) to physically break up and remove the clog.

Frequently Asked Questions

How can I prevent my drain from clogging?

To prevent drain clogs, be mindful of what goes down the drain and regularly clean the drain with a wire brush or plunger. Avoid pouring grease, oil, or food particles down the sink, and use a drain cover or filter to catch hair and debris.

When should I call a plumber for a clogged drain?

If you've tried DIY methods like a plunger or drain snake and the clog persists, or if the water is not draining at all, it's best to call a professional plumber. They can use specialized equipment to thoroughly clear the blockage and identify any underlying issues.

Get help from a local pro

Connect with certified professionals in your area