our services
Sewer Line Replacement
Trenchless Sewer Repair in Portland, OR
Sewer Line Replacement Solutions
When a sewer line is severely damaged, collapsed, or no longer functional, replacement is sometimes the only reliable solution. Sewer line replacement addresses underlying issues such as aging materials, root intrusion, shifting soil, or repeated failures that short-term repairs can’t resolve.
At Black Rock Underground, we focus on replacement solutions that prioritize durability, code compliance, and minimal disruption. Whether trenchless methods are possible or selective excavation is required, our approach is based on clear evaluation, honest recommendations, and long-term performance homeowners can depend on.
How It Works
Limited Access Points
The process requires only two small access areas at the beginning and end of the sewer line, reducing the need for open trench digging across the property.
Old Pipe Replaced Underground
A specialized splitting head breaks apart the existing pipe while pulling a new pipe into place along the same underground path.
Seamless, Long-Lasting Pipe
The new pipe is a continuous polyethylene line with no joints, helping prevent root intrusion and extending the life of the sewer system.
Potential Flow Improvements
In some cases, the process allows for a modest increase in pipe diameter, improving flow depending on site conditions.
Clear Answers Before You Commit
Sewer Inspection Comes First
Every sewer line replacement starts with a clear understanding of what’s happening underground. A proper sewer inspection allows us to assess the condition of the pipe, identify failures, and confirm whether replacement is truly necessary.
Using camera inspection and on-site evaluation, we gather the information needed to recommend the right solution, not just the fastest one.
Frequently Asked Questions
When Sewer Line Replacement Is Necessary
Sewer line replacement may be recommended when:
Pipes are cracked, collapsed, or structurally compromised
Repeated backups or blockages continue after repairs
Older materials like clay, Orangeburg, or cast iron are failing
Sewer lines have shifted due to soil movement or settlement
Root intrusion has caused irreversible damage
Every situation is different. Our role is to determine whether replacement is truly necessary and explain why, not push unnecessary work.
Our Replacement Approach
Every project begins with a thorough evaluation of the sewer line and surrounding conditions. When replacement is the right solution, we clearly explain the process, expected timeline, and available options.
Our team focuses on:
Proper permitting and code compliance
Careful planning to minimize disruption
Clear communication from start to finish
Durable materials designed for long-term performance
Whenever possible, trenchless replacement methods are used to preserve landscaping, driveways, and structures. If excavation is required, restoration is planned as part of the process.
How do I know if my sewer line needs to be replaced instead of repaired?
Replacement is typically recommended when a sewer line is collapsed, severely cracked, made from failing materials, or experiencing repeated issues that repairs can’t resolve. A camera inspection and site evaluation help determine whether repair is still viable or if replacement is the more reliable long-term solution.
Is sewer line replacement always a major excavation?
Not always. In some cases, trenchless replacement methods can be used to avoid extensive digging. When trenchless options aren’t appropriate, excavation may be required, and restoration is planned as part of the project so the property is returned to usable condition.
How long does sewer line replacement take?
The timeline depends on factors like pipe length, depth, site conditions, and permitting requirements. Once work begins, most residential sewer line replacement projects are completed within a defined timeframe, which is clearly explained before construction starts.
HAVE A QUESTIONS?
If you’ve been told your sewer line may need replacement, it’s normal to have questions. We take the time to explain what’s happening, outline realistic options, and help you understand what makes sense for your property. No pressure. Just clear answers and dependable guidance.
Built on Honesty, Care, and Craftsmanship
Restoration Is Built In
Sewer line replacement doesn’t end once the pipe is installed. Restoration is a critical part of the job.
We take responsibility for returning the property to clean, functional condition, including soil grading, surface repairs, and coordination with restoration needs. The goal is to leave properties better than we found them, not unfinished or disrupted.