Your sewer line is one of the most critical components of your home’s plumbing system—but because it’s underground, problems often go undetected until serious damage occurs.
At Ongaro & Sons, we offer professional sewer line inspections to help homeowners and home buyers in Northern California make informed decisions and avoid costly surprises.
Using advanced camera inspection technology, our licensed plumbers can quickly and accurately assess the condition of your sewer line without digging up your yard.
Whether you’re buying a new home, preparing to sell, or simply want to understand the health of your existing plumbing system, a sewer line inspection gives you the insight you need.
From detecting clogs and root intrusions to identifying corrosion, cracks, or collapsed pipes, our inspection service uncovers issues early, when they’re most manageable and affordable to fix.
Sewer Line Inspections in North California
Call Ongaro & Sons when you need a team of experts to assess the health of your plumbing and sewer line systems. We have the highest level of licensing in California and remain diligent about staying up to date with new and advanced technology in our industry.
Don’t wait for a plumbing emergency—schedule a sewer line inspection today and enjoy peace of mind knowing your system is in good shape.

Importance of a Sewer Line Inspection Before the Purchase and Sale of a Home
Are you selling or purchasing a home in Northern California? Or are you a real estate agent helping a client sell or buy a home? Don’t forego a sewer line and plumbing inspection!
Sewer line inspections allow sellers to uncover and address plumbing problems before putting a home on the market, helping avoid surprises during escrow.
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 Northern California. 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.
PHCC- and NATE-Certified Experts
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—no surprises.
Why Schedule a Private Sewer Line Inspection?
Even if you're not buying or selling a home, a sewer line inspection is a smart step for protecting your investment and avoiding costly surprises. Think of it as a health check-up for your plumbing system—one that offers peace of mind and early detection of potential problems.
Here’s why a private sewer inspection is worth considering:
Catch issues like cracks, blockages, or root intrusions early—before they lead to backups or expensive yard excavation.
Call to Schedule a Sewer Line Inspection Today
Whether you’re preparing to sell your home, finalizing a purchase, or simply want peace of mind as a homeowner, a professional sewer line inspection is one of the smartest decisions you can make. At Ongaro & Sons, we combine decades of plumbing expertise with cutting-edge camera inspection technology to give you a clear, accurate picture of your underground sewer system—without the mess or guesswork.
Don’t let hidden issues catch you off guard. Protect your property, plan confidently, and ensure the long-term health of your plumbing system.
Call 415-741-2820 or request services online today to schedule your sewer line inspection in Marin, Sonoma, or Napa counties, and throughout Northern California.
5%
Member Discount

Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Neglecting your routine checkups can potentially put everyone at risk.
With these annual visits, our experienced technicians use the latest technology to help find unsafe problems before they can become bigger problems.
Maintenance Plan Benefits
Member benefit of 5% discount on repairs and replacements.
Proactive maintenance identifies and addresses issues before they become big problems.
Courtesy reminder calls for scheduled services and appointments.
Special Offers
Enjoy our seasonal promotions and save on your next service.
Limited-time offers—don’t miss out!
Free MacBook Air
With HVAC Upgrade*
$700 Off
Hydro Jet Sewer Cleaning*
FREE
Camera Inspection*
$69
HVAC System Diagnostic*
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Frequently Asked Questions
Yes—dry P-traps, cracked vent lines, or broken seals can allow gases to escape indoors.



