10 Causes of Repeated Drain Clogs (& How to Eliminate Them for Good)

A clogged drain is frustrating enough the first time, but when the same drain keeps clogging over and over, it becomes a real headache. Many homeowners try quick fixes like plungers or chemical cleaners, only to find the problem returns a few days later. The truth is, repeated clogs are usually a sign of an underlying issue that needs more than a temporary solution. 

From buildup inside the pipes to hidden damage underground, there are several reasons why your drains may keep backing up. The good news is that most of these causes can be identified and eliminated with the right approach. In this blog, we’ll cover 10 common causes of repeated drain clogs and explain how to get rid of them for good.

Why Do Drains Keep Clogging?

Clogs often start small, with bits of grease, soap, or debris slowly sticking to the inside of your pipes. Over time, this buildup narrows the pathway for water, causing it to drain more slowly until a full blockage forms. A one-time clog might be caused by something simple, like food scraps or hair, but repeated clogs are usually a sign of a bigger problem. Sometimes the issue lies in the way the pipes were installed, while other times it could be tree roots or pipe damage underground. Ignoring recurring clogs only leads to frustration, water backups, and even costly repairs. Tackling the root cause is the only way to keep drains flowing freely for the long term.

10 Causes of Repeated Drain Clogs

If your drains keep clogging, there’s almost always an underlying reason. Some issues are caused by everyday household habits, while others stem from hidden plumbing problems underground. Identifying the true cause of a clog is the first step toward finding a long-term fix. Here are the 10 most common culprits.

1. Grease, Oil, and Fat Buildup

Pouring grease or cooking oil down the drain causes it to harden inside pipes, trapping food particles and creating sticky clogs.

2. Hair Accumulation in Showers and Sinks

Hair is one of the leading causes of bathroom clogs, especially when mixed with soap residue.

3. Soap Scum and Residue

Traditional bar soaps leave behind a sticky film that builds up on pipe walls, restricting water flow.

4. Food Waste in Kitchen Drains

Even small food scraps can collect over time, especially starchy items like pasta or rice that expand with water.

5. Flushing Non-Flushable Items

Wipes, paper towels, cotton balls, and hygiene products don’t break down in water and can quickly block pipes.

6. Tree Root Intrusion in Sewer Lines

Roots grow toward moisture and can break into sewer pipes, causing repeated and stubborn clogs.

7. Broken or Collapsed Pipes

A damaged pipe creates blockages where debris easily collects, leading to clogs that won’t go away with simple fixes.

8. Mineral Buildup from Hard Water

In areas with hard water, minerals accumulate inside pipes and reduce water flow over time.

9. Poor Drain or Pipe Installation

Improperly sloped or poorly installed pipes can prevent water from flowing properly, making clogs more likely.

10. Lack of Regular Maintenance

Without routine cleaning, small clogs are left to grow into bigger ones, causing constant issues.

How to Eliminate Drain Clogs for Good

Once you’ve identified what’s causing your drains to clog repeatedly, the next step is finding the right solution. Some minor issues can be handled with simple at-home methods, but more serious or recurring problems require professional tools and expertise.

DIY Solutions

• Use drain strainers: Catch food, hair, and debris before they enter the pipes.

• Flush with hot water and baking soda: Helps clear minor buildup and deodorize drains naturally.

• Be mindful of what goes down drains: Avoid grease, oil, and non-flushable items.

Professional Solutions

• Hydro jetting: Uses high-pressure water to completely clear grease, roots, and mineral buildup.

• Pipe repair or replacement: Fixes broken or collapsed pipes that cause repeated clogs.

• Sewer camera inspections: Identifies hidden issues deep in your plumbing system so they can be addressed directly.

Preventing Future Clogs

The best way to deal with repeated drain clogs is to stop them before they start. Preventive care not only keeps your plumbing running smoothly but also saves you from expensive repairs down the road. By making a few smart changes to daily habits and scheduling regular professional checkups, you can keep your drains clear long-term.

Prevention Tips

• Install drain screens: Stop hair, soap, and debris from getting into pipes.

• Dispose of grease properly: Pour it into a container instead of down the drain.

• Run hot water after use: Helps clear away small bits of buildup before they harden.

• Schedule annual drain cleaning: Keeps pipes clear and catches issues early.

Say Goodbye to Stubborn Clogs with Olympic Plumbing Technology

Repeated drain clogs can feel endless, but the right solutions make all the difference. From identifying the cause to taking preventive steps, you can protect your home’s plumbing system and avoid frustrating backups. For expert drain cleaning and long-term plumbing solutions, contact Olympic Plumbing Technology to get the job done right the first time.