Yes, tree roots can come back after drain clearing if the entry point in the pipe has not been repaired. High-pressure water jetting or root cutting can remove the roots that are blocking the line today, but roots naturally grow back toward moisture. If there is still a crack, loose joint, or broken pipe section, the same problem can return.
This is why many Sydney homeowners experience the same blocked drain every few months. The drain gets cleared, the water flows again, and everything seems fixed. Then the roots regrow, catch toilet paper and debris, and the blockage comes back. A proper diagnosis with CCTV drain inspection is the only reliable way to see whether the pipe needs a longer-term repair.
Tree roots are not trying to damage your plumbing. They are simply searching for water and nutrients. Underground sewer and stormwater pipes can provide both, especially if the pipe has a tiny opening. Even a small leak or weak joint can attract nearby roots.
Once roots enter the pipe, they continue growing inside the line. They form a web that catches paper, wipes, grease, leaves, soil, and other debris. Over time, that build-up restricts flow and creates a blockage.
Drain clearing is important because it restores flow and removes the immediate obstruction. But clearing is not the same as repairing. If a pipe is cracked or has separated at a joint, the opening remains after the blockage is cleared. That means roots can return through the same gap.
This is why repeat blockages are a warning sign. If the same drain keeps blocking, the issue is probably not just what went down the sink or toilet. There may be a structural problem inside the pipe.
The timeframe varies depending on the tree species, moisture, pipe condition, and season. Some drains stay clear for months after root cutting. Others block again much sooner. If the pipe defect is large or the root system is aggressive, repeat blockages can happen frequently.
Rather than guessing, a CCTV camera inspection can show whether root regrowth is likely and where the pipe is vulnerable.
If CCTV footage shows that roots are entering through cracks or joints, pipe relining may be suitable. Relining installs a new cured liner inside the existing pipe. Once cured, the liner creates a smooth, sealed internal pipe that covers the damaged section and helps prevent roots from entering again.
This can be a strong option when the pipe has not fully collapsed and the damaged section can be prepared properly. It is especially useful where excavation would damage gardens, paving, driveways, or established landscaping.
Sydney Drain Surgeons also has a short video about pipe relining and blocked drain services here:
If tree roots keep blocking your drain, do not keep paying for temporary fixes without seeing what is happening inside the pipe. Sydney Drain Surgeons provides root removal, CCTV drain inspections, blocked drain services, and no-dig pipe relining across Sydney. Call 02 9190 6765 or request a free quote online.
