Tree and shrub roots can infiltrate drains and cause serious blockages. Over time, they grow, trapping debris and eventually completely blocking the flow of wastewater. When a sewer manhole is blocked by roots, it’s essential to act quickly to avoid backups and overflows.
Identifying a root-clogged manhole cover
Before intervening, it is important to recognize the signs that roots have invaded the pipes:
- Very slow flow or stagnation of water in drains.
- Unpleasant odors rising from manholes and floor drains.
- Wastewater overflow during heavy rainfall or after intensive use of sanitary facilities.
- Visible roots in open manhole.
If these symptoms appear, a thorough unblocking is necessary.
Solutions for unclogging root-infested manholes
Remove roots manually
If the roots are accessible from the manhole, they can be removed by hand or with hooks, pliers or pruning shears.
- Open the manhole and locate any visible roots.
- Use a cutting tool to sever the roots and remove them gradually.
- Rinse the pipe thoroughly to remove any remaining debris.
Use a mechanical ferret or a hydrocleaner
If the roots are deeper in the pipe, we recommend using an electric ferret or a high-pressure hydrocleaner.
- A mechanical ferret with a cutting head cuts roots inside the pipe.
- High-pressure water jetting delivers a powerful jet of water to dislodge roots and thoroughly clean pipes.
Use a natural chemical treatment
Some natural products, such as de-icing salt or copper sulfate, help dry out invasive roots without damaging pipes.
- Pour the product into the pipe in the recommended proportions.
- Leave for several hours before rinsing thoroughly.
- Repeat if necessary to prevent regrowth.
Camera inspection and professional cleaning
If the problem persists despite several attempts to unblock it, a camera inspection can be used to assess the extent of the root invasion and pinpoint the exact location of the blockage. Professional drain cleaning using the right equipment guarantees complete root removal.
Preventing root invasion in pipes
Once the manhole has been unblocked, it is important to take preventive measures to prevent the problem from recurring:
- Regularly prune trees and shrubs near pipes.
- Use protective sleeves around pipes to prevent root infiltration.
- Apply an anti-root product (natural or chemical) in the ducts to limit regrowth.
- Have pipes inspected periodically to detect the first signs of infiltration.
Call on Leader Services
If your pipes are blocked by roots and conventional solutions are not enough, Leader Services uses professional equipment to unblock them efficiently and sustainably.
- Discover our unblocking services: Leader Services – Débouchage
- Need a quick response? Contact us here: Leader Services – Contact
Conclusion
A sewer manhole clogged with roots needs to be treated quickly to avoid more serious complications. Manual extraction, the use of a ferret or hydrocleaner and preventive treatments can restore normal sewage flow. For a thorough unblocking and a lasting solution, professional intervention is often the best option.
