Types of Sewer Line Repair Methods

When a sewer line is cracked, root-filled, sagging or collapsed, it can be dug up and replaced, or fixed with a trenchless method that replaces or lines the pipe through small access pits. In San Jose and South Bay neighborhoods with clay laterals, mature street trees and finished driveways, trenchless sewer repair often saves digging and restoration.

Which one fits depends on what a camera inspection shows: the pipe material, the type and location of the damage, and what’s above the line.

Trenchless options include pipe bursting, cured-in-place pipe lining (CIPP), sliplining and epoxy coating. Hydro jetting, often listed with them, cleans a line rather than repairing it.

Start With a Camera Inspection

Every repair decision starts with a sewer scope inspection showing where the problem is, how deep, and whether the rest of the line is sound; see sewer inspection cost. Roots or grease alone may only need cleaning or hydro jetting.

Traditional Method (Open Trench Repair)

The plumber excavates along the pipe, removes the damaged section or the whole line, and lays new pipe (usually PVC) at the correct slope. It takes heavy equipment, more labor and restoring whatever was on top, so it usually takes longer than a trenchless job.

• Best for: a collapsed pipe a liner or bursting head can’t pass, severe sags that need regrading, rerouting, or short, shallow runs in open ground
• Trade-offs: more digging and restoration of lawns, landscaping, driveways or sidewalks

Trenchless Method

Trenchless repair replaces or renews the pipe through one or two small access pits, so lawns, driveways and landscaping mostly stay intact. The equipment costs more than plain pipe in a trench, but the savings on digging and restoration often make up for it. See what trenchless repair is. CPI Service performs pipe bursting, CIPP lining and spot repairs.

Pipe Bursting

A bursting head is pulled through the old pipe from one access pit to another, breaking it apart while pulling new seamless HDPE pipe into its place. It can keep the same size or upsize slightly.

• Best for: clay, cast iron or Orangeburg laterals that are cracked or root-damaged along much of their length, or too far gone to line
• Trade-offs: needs two access pits; not ideal for severe sags or where other utilities are very close

Cured-In-Place Pipe Lining (CIPP)

A resin-saturated liner is pulled or inverted into the cleaned pipe and inflated; the resin cures with hot water, steam or UV light into a new, jointless pipe inside the old one that roots can’t enter. It’s designed to last for decades when installed correctly.

• Best for: pipes with cracks, leaking joints and roots that still hold their shape
• Trade-offs: slightly reduces the inside diameter; the pipe must be cleaned well first; won’t fix a collapse or a sag

Sliplining

A new, smaller pipe, often HDPE, is pulled into the old one and the gap is grouted. Because the new pipe is noticeably smaller, sliplining is used more on large municipal and commercial pipes than on home laterals, where CIPP does the same job with less loss of diameter.

Epoxy Pipe Coating

Epoxy is sprayed or brushed inside a cleaned pipe, forming a corrosion-resistant layer that seals pinholes and small leaks. It suits sound but corroding pipe, such as older cast-iron drains; it doesn’t strengthen a cracked or broken lateral.

Spot (Point) Repair

A short liner or a small excavation fixes a single break, offset joint or root entry point in an otherwise sound line.

Sewer Jetting

Hydro jetting uses high-pressure water to clear grease, sludge and roots. It cleans a line before inspection or lining and is the fix when a sound pipe is only clogged, but it doesn’t repair cracks, sags or collapses. Lines with recurring roots are often jetted on a schedule set by what the camera shows. In San Jose, jetting a main sewer line typically costs $1,500 to $2,500.

Traditional vs. Trenchless Sewer Line Repair

Both fix the pipe; they differ in digging, time and restoration. See trenchless vs. traditional pipe repair and pros and cons of trenchless sewer repair.

Choosing the Right Method

The camera decides, but these are the usual matches:

Causes of Sewer Line Problems

The cause of the damage often decides the repair. See causes of sewer backups.

• Tree roots enter through joints and cracks and grow until they block or break the pipe. Jetting or cable cutting clears them; CIPP seals cracked joints; bursting replaces a badly broken line. See how to get rid of roots in a sewer line.
• Corrosion in cast iron causes scale, leaks and eventual failure. Coating or lining renews sound pipe; bursting or a trench replaces pipe that’s falling apart.
• Clogs from grease, wipes and debris cause backups. Jetting clears them; if the camera then shows damage that traps debris, the pipe needs a repair.
• Ground movement from settling, earthquakes, traffic or construction cracks pipe and pulls joints apart. Mild offsets can be lined or burst; a sag that holds water usually has to be dug and regraded.
• Aging pipe. Many older laterals are clay, cast iron or Orangeburg at the end of its life; CIPP or bursting renews the whole line.

Permits and Costs

Sewer lateral repair and replacement in San Jose need a permit and inspection, and work in the street needs city approval. Costs depend on the method, the line’s length and depth, and restoration, and are quoted after a camera inspection. In San Jose, a spot repair typically costs $2,000 to $5,000, a typical lateral replacement $6,000 to $15,000, and long, deep or street work $15,000 to $20,000 or more; see sewer line replacement cost.

In San Jose, the property owner is responsible for the lateral from the house to the main; once an approved wye cleanout is installed at the property line, City crews repair the section from the cleanout to the main. The City’s Sewer Lateral Grant Program has been inactive since July 2024 for lack of funding. For coverage, see insurance for sewer lines.

Why Choose Professional Sewer Line Repair

Sewer repair involves trenches, sewage, sewer gas and a permit with City inspections. A licensed contractor brings the camera and locator to find the problem, the equipment to fix it, and the safety practices trench and sewer work require; mistakes in slope or connections cost far more to redo. Ask for a written scope (method, length of pipe, permit, restoration) and the warranty on the work.

Sewer Repairs in San Jose

• Clay laterals and street trees. Roots in older laterals are the most common reason South Bay homeowners need a sewer repair.
• Driveways and landscaping. Trenchless methods avoid tearing up what’s on top of the line.
• Older homes. Many 1950s to 1970s homes have their original laterals; a camera inspection shows how much life is left.

CPI Service repairs and replaces sewer lines throughout San Jose and the South Bay. See sewer line replacement, request a free estimate or call (408) 978-3093.