Trenchless Sewer Repair in San Francisco

Signs Your Sewer Line May Need Repair

Sewer line problems rarely announce themselves clearly. Most homeowners notice a pattern of smaller symptoms before the underlying issue becomes obvious. These are the signs worth taking seriously:

• Recurring clogs across multiple drains point to a main sewer line blockage, not a localized problem
• Sewage odors from drains or the yard indicate a crack or break allowing gases to escape underground
• Slow drainage in sinks, tubs, or showers that doesn’t respond to standard clearing may trace back to the sewer line
• Unusually lush or soggy patches in the lawn can signal a leaking line fertilizing the soil below
• Sewage backups into drains, tubs, or toilets are a sign of severe blockage or pipe collapse requiring immediate attention
• Gurgling sounds from drains or toilets indicate trapped air from a partial blockage in the line

Tree roots are one of the most common causes of sewer line damage in San Francisco, where tree-lined streets run through nearly every neighborhood. A root intrusion that starts as a slow drain can progress to a full blockage or pipe fracture if left untreated.

Trenchless Repair Methods We Use

Before any repair begins, we run a sewer camera inspection through the affected line. This diagnostic step shows us the pipe’s condition from the inside, identifies the location and type of damage, and determines which repair method fits the situation.

Pipe Lining (CIPP)

Cured-in-place pipe lining, or CIPP, is used for pipes that are cracked, corroded, or leaking but still hold their basic shape. We insert a flexible liner saturated with epoxy resin into the damaged pipe, expand it against the pipe walls using an inflatable bladder, and cure it in place. The result is a seamless new pipe formed within the old one, without removing the original line. CIPP is well-suited to the clay and cast iron pipes common in San Francisco’s older housing stock.

Pipe Bursting

For severely deteriorated or collapsed lines, pipe bursting is the more appropriate method. A bursting head is pulled through the existing pipe, fracturing it outward while simultaneously drawing a new high-density polyethylene (HDPE) pipe into position. HDPE pipe resists corrosion and root intrusion and can last for decades, replacing the line entirely without the trench that conventional replacement requires.

Spot Repairs

When damage is confined to one section of pipe, a spot repair targets only that segment, avoiding full-line replacement when the rest of the pipe is in acceptable condition.

Not every situation is a candidate for trenchless methods. Fully collapsed lines or significant pipe misalignment may require further assessment before a repair approach is confirmed. We’ll give you a straight answer about what your line needs. Sewer lateral work in San Francisco that involves the public right-of-way requires a side sewer permit through the city’s Department of Public Works and Department of Building Inspection. We know that process well.