What is sewer pipe lining?
Sewer pipe lining, also called cured-in-place pipe or CIPP, installs a new pipe inside your old one. A flexible tube soaked in resin is inserted, pressed against the host pipe and hardened, leaving a smooth, jointless lining that seals cracks and root entry points.
The old pipe stays in the ground and acts as a form. Once cured, the liner carries the flow on its own, so leaks through the original joints stop. Because the liner has no joints of its own within the lined length, roots have nowhere to enter.
Lining is a rehabilitation method, not a cure-all. The host pipe needs to be cleaned to bare wall, it needs to hold its basic shape, and its slope needs to be workable, because the liner follows whatever path the old pipe takes. A camera inspection confirms all three before anyone quotes the job.
How does sewer pipe lining work?
Preparing the host pipe
The line is jetted and descaled until the camera shows clean pipe wall. Roots are cut flush, and protruding connections or heavy tuberculation in cast iron are ground down. Poor preparation is the most common reason a liner fails to bond.
Wet-out
The liner tube, made of felt, fiberglass or a similar fabric, is saturated with a measured amount of resin, typically an epoxy for residential laterals. This can happen on site or at the supplier.
Installation
The liner is either pulled into position with a cable or inverted, turned inside out by air or water pressure, as it advances through the pipe. A bladder inside it presses it firmly against the host pipe wall.
Curing
The resin hardens with ambient cure, hot water, steam or UV light depending on the system. Cure time varies with method, temperature and pipe length.
Reinstating connections
Where another drain joins the lined section, a robotic cutter reopens the connection from inside. Some systems add a short top-hat liner to seal the junction.
When does a lateral need lining?
- Roots at several joints keep returning after cutting.
- Hairline or longitudinal cracks appear along a long stretch on camera.
- Leaking joints are letting soil and sand into the pipe.
- Cast iron with interior corrosion still holds its round shape.
- The lateral runs under a driveway, foundation or wall.
- Odor outside suggests gas escaping from open joints.
- A pipe that is sound in shape but rough enough to snag paper and wipes.
- An inspection report at sale flags cracking that buyers want fixed.
What problems does a liner solve, and which can it not?
Lining solves problems in the pipe wall: cracks, open joints, small holes, corrosion pitting and root intrusion. It also smooths the interior, which helps waste move through older lines.
It does not fix problems with the pipe's path. A belly stays a belly. An offset joint large enough to block the liner must be repaired first. A fully collapsed section has nothing for the liner to form against, so it needs excavation or bursting. Lining also reduces the inside diameter slightly, which is rarely a problem on a 4-inch residential lateral but is worth asking about.
On the Peninsula, where many laterals are mid-century clay or cast iron, lining is often the best fit for lines that are cracked and root-filled but not crushed. Where ground movement is active, ask how the chosen system tolerates continued shifting.
What can you check before a lining estimate?
- Get, or ask for, a recent camera video showing the whole lateral with footage marks.
- Note every drain that connects to the line, such as a laundry or an outdoor sink, so connections are planned.
- Confirm the cleanout location and whether it is usable; a damaged cleanout may be replaced as part of the job.
- Plan for limited water use during installation and curing.
WarningBe wary of any lining quote given without a camera inspection. The contractor cannot know the pipe is lineable, or how long the liner must be, without seeing it.
How does a lining job go, step by step?
- Video survey and measurement of the full lateral.
- Written scope naming the liner system, resin, length and warranty.
- Permit from Rancho Palos Verdes Building & Safety where the work requires one.
- Cleaning to bare pipe by jetting and descaling.
- Liner wet-out and installation through the cleanout or a small access pit.
- Cure for the time the system requires.
- Reinstatement of connections and trimming of the liner ends.
- Final camera video showing the lined pipe from end to end.
What drives the cost of sewer pipe lining?
| Factor | How it changes the job |
|---|---|
| Lined length | Full-length lining costs more than a sectional point liner. |
| Preparation | Heavy scale or roots mean more cleaning before the liner goes in. |
| Bends | Multiple bends need a more flexible liner and careful installation. |
| Connections | Each branch that must be reopened adds time and equipment. |
| Cure method | Steam, hot water, UV and ambient systems carry different costs. |
| Access | Lining from the cleanout costs less than digging a launch pit. |
Is lining an emergency repair?
No. Lining is planned work that follows cleaning and inspection. If the line is backing up now, the immediate step is to open it, then film it. In many cases the jetting done to clear the backup doubles as preparation, and the liner can be scheduled shortly after once the length is measured and any permit is in hand.
Sewer pipe lining FAQs
Can old clay laterals in Rancho Palos Verdes be lined?
Yes, if they are cleaned, hold their shape and do not have severe offsets or sags. Clay lines with root-filled joints are one of the most common lining jobs.
Will a liner make my pipe smaller?
Slightly, by the liner's wall thickness. The smooth interior usually offsets this, and it rarely affects a residential lateral.
Can roots grow through a liner?
A properly installed liner has no joints within the lined length, so roots have no entry point. The transitions at each end are the places to check on future inspections.
Do I need a permit for pipe lining?
Rehabilitation of a lateral generally falls under a plumbing permit from the City's Building & Safety Division. Your contractor should confirm the requirement.
How long does curing take?
It depends on the system. UV and steam cures are fast; ambient cures take longer. Your contractor will tell you when water use can resume.
What warranty comes with a liner?
Warranties vary by installer and product. Get the warranty, the product name and the final video in writing.
What should you ask before approving a liner?
A liner is only as good as the preparation and the product behind it. Ask these before approving the work, and keep the answers with your final video.
- Has the whole line been filmed after cleaning? Defects hidden under grease or roots only show once the wall is clean; the liner length depends on them.
- What liner material and resin system will be used? Epoxy, polyester and vinyl ester resins behave differently. Ask for the product name and its data sheet.
- How will you cure it, and how long until I can use water? Steam, hot water, UV and ambient curing all have different timings and equipment needs.
- How are the ends of the liner sealed? The transitions where the liner meets old pipe are where problems can start; ask how they are finished.
- What is excluded from the warranty? Some warranties exclude damage from ground movement or from root growth at unlined sections. Read the terms.
- Will you reinstate every connection? Confirm each branch that joins the lined section is identified, reopened and shown on the final video.
What else might the job include?
Lining always starts with hydro jetting to strip the pipe back to bare wall. If the camera finds a collapsed section, that part may need pipe bursting or a dig before the rest can be lined, and lining itself is one of several trenchless sewer repair approaches. For how lining compares with every other repair, read about how sewer line repair works in RPV.
Mid-century clay laterals in tracts such as Mira Catalina are typical candidates when roots have opened the joints.
Sewer pipe lining by neighborhood
See how lot slope, pipe era and access shape a lining job in each part of Rancho Palos Verdes.
- Sewer Pipe Lining in Eastview
- Sewer Pipe Lining in Miraleste
- Sewer Pipe Lining in West Palos Verdes
- Sewer Pipe Lining in Los Verdes
- Sewer Pipe Lining in Monaco
- Sewer Pipe Lining in La Cresta
- Sewer Pipe Lining in Del Cerro
- Sewer Pipe Lining in Mesa Palos Verdes
- Sewer Pipe Lining in Mira Catalina
- Sewer Pipe Lining in Ladera Linda
- Sewer Pipe Lining in Crestridge
- Sewer Pipe Lining in Seaview
- Sewer Pipe Lining in Portuguese Bend
- Sewer Pipe Lining in Abalone Cove
- Sewer Pipe Lining in Island View