Sewer Line Replacement
Sewer Line Replacement Services in Marin, Sonoma & Napa County
Sometimes, repairing your sewer line simply isn’t enough. If your pipes are severely corroded, collapsed, or outdated, full replacement may be the most effective, and safest, solution.
A damaged sewer line can lead to persistent leaks, sewage backups, and even hazardous waste exposure. These issues not only pose serious health risks but can also cause costly property damage and environmental harm.
Replacing a failing sewer line helps restore the integrity of your plumbing system, improves efficiency, and significantly reduces the risk of contamination. It’s a proactive step that protects your home, your health, and your peace of mind.
When your sewer line is damaged beyond repair, prompt replacement is essential to protect your home and health. Ongaro & Sons provides expert sewer line replacement services in Marin, Sonoma, and Napa counties, and nearby the North Bay communities. We combine service since 1932 and plumbing experience with the latest techniques to ensure a smooth, stress-free process from start to finish.
How to Tell if Your Sewer Lines Need Replaced
Knowing the warning signs can help you avoid bigger plumbing emergencies. You may need sewer line replacement if:
- Constant clogs, slow drains, or sewage backups often point to a failing sewer line, especially if repairs no longer provide long-term relief.
- Pooling water or persistent smells in your yard may indicate a cracked or collapsed sewer pipe leaking waste underground.
- Homes with sewer lines over 50 years old, especially those made from clay, cast iron, or Orangeburg, are more prone to collapse or corrosion and may need proactive replacement.
- Tree roots can infiltrate and crush old sewer pipes, disrupting flow and causing irreversible damage that makes replacement the most effective solution.
- If you’re planning a home addition or extensive remodel, upgrading your sewer line can prevent issues with increased demand on your plumbing system.
Our Sewer Line Replacement Process
At Ongaro & Sons, we take every measure to ensure your sewer replacement project is handled with care and precision. Here’s what you can expect:
We begin with a detailed sewer camera inspection to pinpoint the damage and determine the best replacement method.
Our experienced team provides transparent recommendations and clear guidance before any work begins.
Whenever possible, we use minimally invasive trenchless techniques like pipe bursting to replace the line without damaging your landscaping.
Our licensed, bonded, insured, and licensed plumbers complete your sewer line installation project quickly and safely using only high-quality materials.
We offer financing plans (w.a.c), with approved credit, to help make your sewer line replacement affordable and manageable for your budget.
Trenchless Pipe Bursting
Pipe bursting is an excellent method for replacing damaged and outdated pipes, it doesn’t leave a mess! You can avoid digging a trench in your yard, protect your property, and have peace of mind knowing the worksite is much safer and less disruptive to your routine.
Pipe bursting is beneficial for many reasons, including:
- Results in less damage
- Requires less intensive labor and machinery
- Provides a safer alternative to excavation
- Increases pipe flow capacity

Why Choose Ongaro & Sons?
Don’t let a failing sewer line turn into a costly emergency. Trust our plumbers for safe, professional sewer line replacement in Novato, Tiburon, Sebastopol, and the neighboring communities across Napa, Marin, and Sonoma counties.
- Serving the North Bay since 1932
- Licensed, insured, and trusted local professionals
- Advanced trenchless technology is available
- Clean, courteous, and respectful crews
- 100% satisfaction guarantee

Schedule Your Sewer Line Replacement Service
Don’t let a damaged sewer line put your home and health at risk. We proudly serve Sonoma, Marin, and Napa counties, including Novato, Tiburon, Sebastopol, and surrounding communities. Call us now at 415-741-2820 or book your appointment online for safe, professional sewer line replacement you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Sewer Line Replacement
Replacement is a big job, so it is worth being certain it is the necessary one.
Schedule Service →Replacement recommended only when repair will not hold
A line failing in several places, or one that has lost grade, needs replacing. A single defect usually does not. The camera decides, not the estimate.
C-42 licensed for lateral work
Santa Rosa requires a Class A or C-42 contractor for sewer lateral plumbing. Ongaro & Sons holds that classification.
Pipe bursting where the route allows
Bursting pulls a new line through the old one, which avoids opening the full length and keeps reinstatement costs down.
Reinstatement priced into the job
Paving, planting and hard landscaping are part of the real cost. They belong in the quote rather than in a later conversation.
Permits pulled and the record kept
Replacement is permitted and inspected work, and that documentation is what a buyer's inspector will ask for later.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can sewer odors enter my home?
Yes, dry P-traps, cracked vent lines, or broken seals can allow gases to escape indoors.
Do I need permits for sewer line installation?
Yes, permits and inspections are required to ensure code compliance and public safety.
How often should I inspect my sewer line?
Have your line inspected with a camera every 1–2 years, especially if your home is older or surrounded by trees.
What causes sewer backups?
Common causes include tree roots, grease buildup, damaged pipes, and flushing inappropriate items.
What materials are used in modern sewer line replacement?
Durable options like PVC or HDPE are commonly used for their longevity and resistance to corrosion or root intrusion.