How to Get Rid of Sink Flies?

Sink flies, also known as drain flies, can be a frustrating problem in kitchens and bathrooms. These tiny pests breed in the organic buildup inside drains, and even if you clean the surface, they often keep coming back unless you tackle the root cause.

In this guide, we’ll explain what causes sink flies, how to eliminate them, and how to keep them from returning.

What Are Sink Flies and Why Do They Appear?

Sink flies are small, moth-like insects that thrive in moist environments with organic matter, such as:

• Kitchen sinks with food residue

• Bathroom drains with hair and soap scum buildup

• Unused drains where stagnant water collects

They lay eggs in the slime layer inside drains, so the infestation often starts below the surface, where you can’t see it.

Step-by-Step: How to Get Rid of Sink Flies

Step 1: Clean the Drain Thoroughly

• Remove any visible debris from the drain opening.

• Use a drain brush or plumber’s snake to scrub inside the pipe walls.

Step 2: Pour a Cleaning Solution

Mix one part baking soda with one part salt and two parts vinegar. Pour it into the drain, wait 15 minutes, and flush with boiling water.

Step 3: Use an Enzyme Cleaner

Enzyme-based drain cleaners break down the organic material that sink flies feed on. They are safer than harsh chemical cleaners and work deep inside the pipes.

How to Prevent Sink Flies from Coming Back

• Run water regularly in rarely used drains.

• Use drain strainers to keep debris out.

• Clean drains monthly with baking soda and vinegar.

• Fix leaks to eliminate moist breeding grounds.

When to Call a Professional

If your sink flies keep coming back even after deep cleaning, the infestation may be deeper in your plumbing or your home’s sewer line. A professional plumber can inspect, clean, and treat your drains to fully remove the problem.

Call Vertical Plumbing at (480) 577-8720