How to Remove Tree Roots from a Septic Tank

Tree roots can be one of the most common and frustrating problems for septic system owners. As trees grow, their roots naturally seek out sources of water and nutrients, and your septic tank or pipes offer exactly that. If left unchecked, roots can penetrate the pipes, tanks, and drain fields, causing blockages, cracks, and even total system failure.

Here’s how to safely remove tree roots from your septic tank and prevent future damage.

Signs That Tree Roots Are Invading Your Septic Tank

Tree roots can cause various problems for your septic system, but it’s important to catch the signs early. Here’s how you can tell if roots are invading your septic tank or pipes:

Slow drains throughout the house.
Gurgling noises in the plumbing.
Backups or clogs in the toilets or drains.
Pooling water around the septic tank or drain field.
Unusually lush or green grass near the septic system, indicating leaks or excess moisture from root damage.

Steps to Remove Tree Roots from a Septic Tank

Removing tree roots from your septic system requires careful attention to avoid further damage. Here are the key steps:

1. Confirm the Presence of Roots

Before attempting removal, confirm that roots are the issue and not a clogged pipe or full septic tank. A professional septic service can use sewer cameras to inspect the tank and pipes.

2. Mechanical Root Removal

Once tree roots have been confirmed, one option is to mechanically remove them using a sewer auger or rooter machine:

Augers and rooters: These tools have rotating blades that cut through roots in the pipes.
Manual removal: For larger root masses, manual excavation may be necessary to physically cut and remove the roots from the system.

3. Chemical Root Killers

Another option is to use chemical root killers designed specifically for septic systems:

Copper sulfate: This is a common root-killing chemical. It doesn’t damage pipes but effectively kills roots. Simply pour it down the toilet (never directly into the septic tank) and flush. It will travel through the pipes, killing roots as it goes.
Foaming root killers: These products create a foam that coats the inside of your pipes and kills existing roots. They are often more effective than liquid root killers because they can reach the top of pipes where roots typically grow.

4. Professional Root Removal

If the roots are extensive or if manual and chemical removal methods don’t work, you may need to hire a professional plumber or septic technician:

Hydro-jetting: This method uses high-pressure water to remove roots and debris from the pipes.
Excavation: For severe root invasion, excavation may be necessary to expose the pipes or septic tank for direct removal and repair.

Preventing Future Tree Root Invasions

Once you’ve removed the tree roots from your septic system, taking steps to prevent future invasions is crucial.

1. Remove Problematic Trees

If tree roots continue to invade your septic tank or pipes, you may need to remove nearby trees. Trees with aggressive roots, like willows, maples, and oaks, should be planted far from septic systems.

2. Install Root Barriers

Root barriers are physical barriers placed between the trees and your septic system. These barriers prevent roots from spreading into the septic tank or drain field:

Barrier materials: Plastic, metal, or fabric root barriers can be installed to direct roots away from the septic system.

3. Use Root-Killing Products Regularly

Preventative treatments with foaming root killers or copper sulfate can help prevent future root growth in pipes. These should be applied once or twice a year to maintain root-free pipes.

4. Regular Inspections

Scheduling annual septic inspections ensures that any new root growth is caught before it becomes a problem. A professional can use a camera to check the system for any signs of root re-invasion.

Table: Tree Root Removal and Prevention Methods

Removal/Prevention Method	Description
Sewer Auger or Rooter Machine	Mechanically cuts through roots in pipes using rotating blades.
Copper Sulfate	Chemical root killer; poured down drains to kill roots in pipes (use cautiously).
Foaming Root Killer	Foams inside pipes, killing roots that cling to the pipe walls.
Hydro-Jetting	High-pressure water method to blast roots out of pipes.
Excavation	Physically dig up the tank and pipes to remove large root systems.
Root Barriers	Install barriers between trees and septic system to prevent root invasion.
Tree Removal	Remove trees with aggressive roots that are too close to the septic system.

What Happens If You Don’t Remove the Roots?

If tree roots are not removed from your septic tank and pipes, they can cause significant damage, leading to:

Clogs and backups: Roots can completely block pipes, leading to sewage backups in your home.
Cracks and leaks: Roots can penetrate and crack the septic tank or pipes, leading to leaks that contaminate the surrounding soil and groundwater.
Drain field failure: If roots invade the drain field, they can prevent proper filtration of wastewater, causing the entire system to fail.
Costly repairs: If left unchecked, root damage can require extensive repairs or even the replacement of your entire septic system.

Conclusion

Tree roots can cause serious problems for your septic system, from slow drains to complete system failure. The good news is that there are several ways to remove them and prevent future invasions. Whether you opt for mechanical removal, chemical root killers, or professional help, addressing the issue quickly is essential. In addition, taking preventive measures like removing problematic trees and installing root barriers can help protect your septic system for the long term.