What is sewer root removal?
Sewer root removal is the work of cutting tree and shrub roots out of a drain line and restoring flow. A complete job also deals with the openings the roots grew through, because a cleared pipe with open joints simply grows a new root mass.
Roots do not break into a healthy, sealed pipe on their own. They find a tiny opening, such as a joint whose mortar has crumbled or a hairline crack, and follow the moisture and nutrients leaking from it. Inside the pipe the conditions are ideal, so fine hair roots multiply into a dense mat that strains paper and grease out of the flow.
That is why root removal is usually described as two jobs. The first, cutting, restores drainage the same day. The second, prevention, ranges from periodic maintenance to sealing the pipe permanently with a liner or new section, and that choice depends on what the camera shows.
How are roots removed from a sewer line?
Contractors use three main approaches, often in combination.
Mechanical cutting
A drain machine spins a steel cable with a cutting head sized close to the pipe's inside diameter. As it advances, the blades shear roots off flush with the pipe wall. This is fast and effective for opening a line, but it tends to leave short stubs at the joint that regrow.
Hydro jetting with a root-cutting head
Water-driven cutting nozzles spin at high speed and slice roots while the jets flush the pieces away. Jetting also strips the grease that usually coats a root mass, so the pipe ends up cleaner than with a cable alone.
Foaming root treatment
After cutting, some contractors apply a foaming root inhibitor that coats the pipe interior and kills root tissue at the joints, slowing regrowth. Products and their use are regulated, so ask what the contractor uses and whether it is approved for sewer laterals in Los Angeles County.
Sealing the entry points
The lasting fix closes the gaps. A cured-in-place liner covers every joint in the lined section. A sectional point liner seals one bad joint. Where the pipe is broken as well as root-filled, the section is replaced with jointless or gasketed pipe that roots cannot penetrate.
How do you know roots are in your sewer line?
- Drains slow down gradually over months rather than clogging all at once.
- Backups return on a pattern, often in the same season each year when trees are most active.
- The toilet bubbles or gurgles when the tub drains.
- A cable machine comes back with root fibers wrapped around its head.
- Large trees or shrubs sit between the house and the street, or close to the cleanout.
- Grass grows thicker along a line across the yard.
- A sewer smell appears outside near the path of the pipe.
- The house has clay or cast iron laterals from the era before gasketed plastic pipe.
Why do roots get into sewer pipes?
Roots grow toward water and oxygen. A sewer lateral that leaks even a little at a joint becomes a steady supply of both, and the warm vapor escaping from it draws roots from a surprising distance.
- Old joints. Vitrified clay was joined with mortar or early compression gaskets. Over decades those seals shrink or crack.
- Cracks from settling. When fill soil settles on a graded lot, pipe sections shift and joints open.
- Mature landscaping. Established trees, hedges and shrubs on irrigated slopes produce large, active root systems.
- Irrigation. Watered lawns and planting beds keep roots near the surface where most laterals run.
- Neighboring trees. Roots cross property lines; the tree causing the problem is not always yours.
Many homes on the Peninsula combine all five: mid-century clay or cast iron pipe, terraced and watered slopes, and trees that have had sixty years or more to grow.
What can you check yourself first?
- Note how quickly the slowdown developed. Gradual slowdowns point to roots; a sudden stop suggests a foreign object or collapse.
- Map trees and large shrubs within about 20 feet of the pipe's likely route from the cleanout to the street.
- Look for earlier invoices that mention root cutting; a history of it tells the next contractor where to look.
- Ask neighbors with similar homes whether they have had root problems; tracts of the same age often share the same pipe.
WarningStore-bought root killers do not clear an existing blockage, and pouring them into a backed-up line only sends them back toward you. Open the line first.
Pro tipBefore planting a new tree, have the lateral located and marked. Keeping thirsty species away from the pipe route prevents the next round of roots.
What happens when a contractor removes roots?
- History and symptoms. The contractor asks how often the line has backed up and when it was last cleared.
- Opening the line. A cutting head or jetter clears enough of the root mass to restore flow.
- Full cleaning. Additional passes remove the remaining roots and the grease they trapped.
- Camera inspection. The video shows how many joints are affected and whether the pipe is cracked or offset.
- Options in writing. You choose between scheduled maintenance, a root treatment, sectional repair or lining the run.
- Follow-up plan. If you choose maintenance, the contractor suggests an interval based on how fast the roots returned.
What affects the cost of root removal?
| Factor | How it changes the job |
|---|---|
| Root density | A solid mat takes more passes than scattered hair roots. |
| Number of affected joints | One joint can get a point repair; many joints point toward lining. |
| Cleaning method | Cable cutting, jetting and root treatment each add their own cost. |
| Pipe condition | Cracks or offsets found on camera move the job from cleaning to repair. |
| Access | A missing or buried cleanout adds setup time. |
| Prevention choice | Maintenance visits cost less now; sealing the pipe costs more once and reduces repeat visits. |
When does a root clog become an emergency?
A root mass can go from a slow drain to a full stoppage when a wad of paper finally catches on it. If sewage is rising in a shower or tub, or seeping from the cleanout, treat it as urgent: stop using water and call. Because roots tend to block gradually, many homeowners get warning weeks ahead, and booking cleaning at the first sign of slowing drains is usually cheaper than an after-hours call during a holiday weekend.
Sewer root removal FAQs
How often do roots grow back after cutting?
It varies with the tree, the season and how open the joint is. Some lines need cleaning again within a year, others go several years. The camera footage from the first cleaning is the best guide.
Who pays if a neighbor's tree roots damage my lateral in Rancho Palos Verdes?
The lateral is the owner's responsibility under City rules, so repair usually starts with you. Disputes over a neighbor's tree are a private matter; documenting the roots on video helps if you raise it with the neighbor or an insurer.
Do I have to remove the tree?
Usually not. Sealing the pipe with a liner or new section stops the problem without losing the tree. Removal is a last resort, and protected or HOA-controlled trees may need approval first.
Is a foaming root treatment safe?
When applied as labeled, these products target root tissue at the pipe. Ask the contractor which product they use and how it is approved for use in sewer laterals.
Can lining stop roots in an old clay pipe?
Yes. A cured-in-place liner forms a continuous pipe with no joints for roots to enter, as long as the old pipe is cleaned and holds its shape.
Does root removal need a City permit?
Cleaning does not normally require one. Replacing or relocating the pipe to fix root damage generally needs a plumbing permit from the City's Building & Safety Division.
What usually follows root removal?
Once roots are out, the camera decides the next move. Lines with roots at most joints are good candidates for sewer pipe lining, which seals every joint in one pass. Where roots have also cracked or shifted the pipe, trenchless sewer repair can replace the damaged run without digging up the trees you want to keep. Cleaning before either step is often done with hydro jetting. For a broader look at causes and repair choices, see our sewer line help for Rancho Palos Verdes homes.
Sloped, heavily planted lots like those in Del Cerro are where roots most often find their way into older laterals.
Sewer root removal in every RPV neighborhood
Each page below looks at how housing age, landscaping and lot slope affect root problems in that neighborhood.
- Sewer Root Removal in Eastview
- Sewer Root Removal in Miraleste
- Sewer Root Removal in West Palos Verdes
- Sewer Root Removal in Los Verdes
- Sewer Root Removal in Monaco
- Sewer Root Removal in La Cresta
- Sewer Root Removal in Del Cerro
- Sewer Root Removal in Mesa Palos Verdes
- Sewer Root Removal in Mira Catalina
- Sewer Root Removal in Ladera Linda
- Sewer Root Removal in Crestridge
- Sewer Root Removal in Seaview
- Sewer Root Removal in Portuguese Bend
- Sewer Root Removal in Abalone Cove
- Sewer Root Removal in Island View