How roots get in
Sewer laterals from the 1950s, 60s and 70s were commonly built from short sections of vitrified clay or cast iron joined end to end. Over decades the joints loosen, the seals break down, and a little warm, nutrient-rich moisture escapes. Tree roots follow that moisture, slip in through hair-thin gaps, and grow into dense mats inside the pipe that catch paper and waste.
The mature street trees and backyard ficus, pines and jacarandas that shade so many Fullerton, Anaheim and La Habra neighborhoods are part of the problem, but even a small shrub can find a cracked joint. Roots do not usually break a sound pipe; they exploit one that has already opened up.
Signs roots may be the cause
- Backups that return every year or two, often after a period of growth
- Slow drains throughout the house rather than at one fixture
- Gurgling toilets when other fixtures drain
- A large tree or hedge between the house and the street
- Previous cleaning invoices that mention roots
- A soggy or unusually green strip of lawn over the line
Cutting roots versus fixing the pipe
Mechanical cutting or jetting
- Restores flow quickly
- Does not repair the joints that let roots in
- Roots typically regrow
- Useful as maintenance while you plan a repair
Lining or replacing the pipe
- Seals or eliminates the joints
- Addresses the cause rather than the symptom
- Larger upfront project, may need a permit
- Depends on camera findings about pipe condition
Repair options for a root-damaged lateral
| Option | Best suited to | Limits |
|---|---|---|
| Scheduled root cutting | Pipe that is structurally sound with root intrusion at a few joints | Ongoing; roots come back |
| Spot repair | One badly damaged or broken section | Other joints remain vulnerable |
| Cured-in-place lining | A pipe that still holds its shape but leaks at joints | Needs a reasonably round pipe and good access; not for collapsed sections |
| Pipe bursting | Replacing the full run where trenching is difficult | Needs access pits at each end; not every soil or route suits it |
| Open-trench replacement | Collapsed, badly sagging or shallow lines | Disturbs landscaping, driveways or hardscape over the line |
A sensible order of operations
- Clear the line.Restore flow so the house is usable.
- Camera it.Record the full length and note where roots enter and whether any section is cracked, offset or sagging.
- Decide on a path.Maintenance cutting if the pipe is sound, a repair or lining if the joints are the issue, replacement if sections have failed.
- Confirm responsibility.Check with the city about which portion of the lateral you are responsible for and what permits apply.
Questions to ask a plumber about roots
- At which footage marks are the roots entering?
- Is the pipe clay, cast iron, or a mix with later repairs?
- Is the pipe round and intact enough to line?
- What would you recommend if this were your house, and why?
Common questions
Do root-killing products work?
Some products can slow regrowth, but they do not repair the open joints. Ask a plumber whether they are appropriate for your pipe and follow the label.
How often should a rooted line be cleaned?
It depends on how fast your roots grow. Watching how long it takes for symptoms to return gives you and your plumber a rough schedule.
Is lining permanent?
Lining seals the old pipe from the inside and is intended as a long-term repair. Ask the installer what product they use and what they guarantee in writing.
General information for North Orange County, not a quote or professional advice. In an emergency, call 911.