Trenchless Sewer Replacement in San Bruno, CA

Two main methods are used. Pipe bursting pulls a cone-shaped head through the old lateral, breaking it outward while new HDPE pipe follows. Lining pulls a resin-soaked tube into the old pipe and cures it into a new pipe inside the old one. Both need only small access pits or a cleanout.

Sloped lots, terraced yards, front steps and driveways sit over many laterals here. Avoiding a long trench through them saves restoration time and keeps the property usable.

A lateral with a deep sag, a collapse or connections that need rebuilding may need open digging. A good contractor says so. See sewer line repair for spot fixes.

Clear the line with main sewer line cleaning to keep the house usable until replacement.

Before any trenchless sewer replacement work in San Bruno, ask for the contractor's California license number and check that it is active with the CSLB license check. Plumbing contractors hold the C-36 classification.

A pit is dug at the house end and another near the main or a cleanout. A cable is threaded through the old pipe, the bursting head is attached with new HDPE pipe behind it, and a winch pulls the assembly through. The old clay fractures into the soil and the new pipe takes its place, often at the same or a larger size. The joints in HDPE are fused, so roots have nowhere to enter.

The old pipe is cleaned, often with a jetter, and checked on video. A felt or fiberglass tube saturated with resin is pulled or inverted into the pipe and inflated, then cured with hot water, steam or light. The result is a smooth, jointless pipe inside the old one. Branches and the connection at the main are reopened from inside with a cutter.

Many San Bruno homes sit above the street with terraced front yards, concrete steps or retaining walls over the lateral. Those are exactly the places trenchless work saves the most. Ask the contractor to show where each pit will go and how they will protect structures nearby.

If a point-of-sale video shows a lateral with defects along its length, replacement may be the fastest way to a certificate of compliance. Coordinate with the city early, and keep the permit, final video and warranty for the buyer.

HDPE pipe used in bursting and resin liners used in lining are both rated for long service lives when installed correctly. Ask which product the contractor uses, who makes it and what warranty they give on materials and labor.

Make sure quotes cover the same length of pipe, both pits or cleanouts, the reconnection at the main, permits, restoration and warranty. A lower price that leaves out restoration can cost more in the end.

• Is my pipe suitable for lining, bursting or both?
• Where will the pits go?
• Is the connection at the main included?
• Who handles the permit and inspection?
• What warranty comes with the work?

See drain cleaning San Bruno for every service.

Crews arrive, set up at the access points and confirm the route with a camera. For bursting, they dig the pits, thread a cable, attach the head and new pipe, and pull. For lining, they clean the pipe, insert the liner and cure it. Then they reconnect at the house and the main, run a final video, backfill the pits and clean up. Many residential jobs finish in a day or two.

Because the San Bruno code makes the owner responsible up to and including the wye at the main, the connection there is part of the job. Ask how the contractor will make that connection, whether it needs work in the street and how that affects price and permits.

Bursting pushes the old pipe outward, which can affect nearby gas or water lines if they are very close. Marking utilities through 811 before work, and checking the video for nearby crossings, protects them. Lining does not push outward, which can make it the safer choice in crowded corridors.

Mid-century fiber pipe that has flattened may be too deformed to line, but bursting can often replace it. The video shows how round the pipe still is, which decides the method.

Keep the permit, final video, product information and warranty. If you sell within five years of a certificate of compliance, the sale trigger does not apply again; even after that, buyers appreciate a lateral with documented recent work.

Good candidates have a lateral that runs fairly straight, with access near the house and near the main, and hardscape or landscaping over the line that would be costly to remove. Poor candidates have collapsed sections, deep sags, many bends or a lateral that needs to move to a new route. The video and a site visit answer the question for your home.

Trenchless work involves machinery at the pits but little at the surface between them. Most homeowners can stay in the house, though water use is limited while the lateral is disconnected. Neighbors may notice equipment for a day or two, which is far less than a full trench.

In bursting, the old pipe breaks into fragments that stay in the soil around the new pipe. In lining, the old pipe stays in place as a host for the liner. Neither leaves a trench of old pipe to haul away.

Owners often ask whether trenchless pipe is as strong as new pipe dug in the old way, whether roots can get through a liner and whether the new line will be smaller. Fused HDPE and cured liners are designed for long service, roots cannot get through seamless pipe, and a liner reduces the inside diameter only slightly while leaving a smoother surface that often flows as well as the original.

If a video shows your lateral is failing along its length, a provider can tell you whether trenchless replacement fits your lot. Calls to (650) 360-4973 are answered 24 hours a day by independent local providers, who explain the likely cause and how the price is set before any work starts. You decide whether to go ahead.