Why Would My Inside House Drain Clog?


A properly functioning septic system is crucial for maintaining a clean and healthy environment in your home. However, there are times when you may encounter issues with a clogged drain in your septic system. Understanding the possible causes of a clogged septic drain can help you prevent this problem and ensure the efficient operation of your system. In this blog, we will discuss some of the common reasons why your septic system drain may get clogged.

1. Accumulation of Solid Waste:

One of the primary reasons for a clogged septic system drain is the buildup of solid waste in the drain field or the pipes leading to it. Over time, the solid waste and sludge that accumulate in the septic tank can make their way into the drain field and clog the pipes. Regular septic tank pumping and maintenance can help prevent this by removing the excess waste and preventing it from entering the drain field.

2. Tree Root Infiltration:

Tree roots are always searching for water sources, and unfortunately, they can find their way into your septic system’s drain field. The roots infiltrate the drain pipes, causing blockages and even pipe damage. As a result, the flow of wastewater is restricted, leading to clogs and backups. Regular inspection and monitoring of the drain field area, avoiding planting trees near the septic system, and, if necessary, treating the roots can help prevent this issue.

3. Excessive Grease and Oil:

Pouring excessive grease, oil, and fat down your drains can contribute to a clogged septic system drain. Grease and oil solidify over time, forming a sticky residue that can build up in the pipes and inhibit the flow of wastewater. It is important to dispose of grease and oil properly, such as by collecting them in containers and disposing of them in the trash. Additionally, using enzymatic drain cleaners can help break down and remove any accumulated grease and oil in the drain system.

4. Flushing Non-Biodegradable Items:

Flushing non-biodegradable items down the toilet or pouring them down the drain can lead to clogs in your septic system. Items like baby wipes, sanitary products, cigarette butts, cotton swabs, and paper towels do not break down easily and can accumulate in the pipes, causing blockages. Educate your household members about proper disposal methods and remind them to only flush toilet paper down the toilet.

5. Water Usage Habits:

Irresponsible water usage habits can also contribute to a clogged septic drain. Excessive water usage, such as running multiple appliances simultaneously or taking long showers, can overload the septic system, overwhelming its capacity to properly filter wastewater. It is important to spread out your water usage throughout the day and practice water conservation to avoid overloading the septic system.

6. Damaged or Collapsed Pipes:

Pipes in the septic system can become damaged or collapsed due to various causes such as tree root infiltration, soil movement, or age-related deterioration. When pipes are damaged or collapsed, the flow of wastewater is disrupted, leading to clogs and backups. Regular inspections by a professional can help identify any potential issues with the pipes and allow for timely repairs or replacements.


A clogged septic system drain can disrupt the proper functioning of your septic system and lead to unpleasant and costly issues. By being aware of the common causes of drain clogs, such as the accumulation of solid waste, tree root infiltration, excessive grease and oil, flushing non-biodegradable items, irresponsible water usage habits, and damaged or collapsed pipes, you can take preventive measures to avoid these problems. Regular septic system maintenance, proper waste disposal practices, and water conservation can all contribute to maintaining a functioning and clog-free septic system.

Need Septic Tank Services in Prior Lake, MN?

Since 1956, Mike’s Septic & McKinley Sewer Services has been providing the local area with an invaluable service. We are a family-owned and -operated company that takes pride in the work that we do and the relationships we build with our customers. We strive for perfection with each job we take and make sure our customers are always happy. At Mike’s Septic & McKinley Sewer Services, we specialize in everything septic. We handle anything from tank and system design to the actual installation. We do septic system and tank repairs, cleaning, pumping, and routine maintenance. We also do tank and system compliance inspections and certification. Contact us today to learn more about what we can do for you!