Are your plumbers licensed and certified?

Yes. Ongaro & Sons operates under California Contractors License #215233 (C-36 plumbing). Our plumbers are PHCC-trained, and we have been founding members of the PHCC Redwood Empire Chapter since 1948 and active members of the PHCC Educational Foundation. We also hold Diamond Certified standing and BBB A+ accreditation since December 1995.

Your Marin & Sonoma Plumber Since 1932

Q: Can a small leak cause major damage?

Absolutely. Over time, even a tiny leak can lead to mold, rot, and structural issues. Our PHCC-affiliated plumbers identify hidden leaks behind walls and under slabs using non-invasive leak detection.

Q: Can I fix plumbing problems myself?

You can handle basic repairs, like replacing a faucet, toilet fill valve and flapper, or showerhead. However, complex issues are better left to licensed plumbers to avoid accidental damage or code violations.

Q: How can I avoid frozen pipes?

To prevent frozen pipes during winter, insulate exposed plumbing, keep garage doors closed, and let faucets drip in extreme cold. If a pipe does freeze, turn off the main valve and call a plumber. Thawing incorrectly can lead to bursts.

Q: How can I protect my home from water damage?

Prevent water damage with regular system checks, prompt leak repairs, and the installation of insulated pipes, sump pumps, and shut-off valves where needed.

Q: How often should I get a plumbing inspection?

Have your plumbing system checked by a professional once a year to catch small issues before they turn into costly repairs.

Q: What can a water filtration system remove?

It removes contaminants like chlorine, lead, sediment, and other impurities for better taste, odor, and safety.

Q: Why does my tap water smell bad?

Odors in water could be caused by bacteria, minerals, or decaying organic matter. The type of smell can help identify the source and the best remedy.

Q: Why is my water pressure low, and how can I fix it?

Low pressure can result from sediment buildup, partially closed valves, or leaks. To restore normal pressure, clean aerators, check valves, and inspect for leaks. If no underlying plumbing issue is found, a booster pump may help. We diagnose and install booster pumps as part of our pump services.

Need Reliable Plumbing Services in Northern California?

Ongaro & Sons has proudly served homeowners in Marin, Sonoma, and Napa counties for over 90 years. Whether you’re dealing with a clogged drain, low water pressure, or a running toilet, our team of expert plumbers can quickly diagnose the issue and provide an effective, long-lasting solution.

We offer a full range of plumbing services, including repairs, installations, and routine maintenance for a multitude of plumbing and water systems—all backed by friendly, licensed professionals who arrive on time and ready to work. You’ll get clear, upfront pricing with no surprises and access to convenient financing options (subject to approved credit), so you can complete any necessary upgrades or repairs.

Our company vans are fully stocked, so most problems are fixed in a single visit. When you need fast, dependable service from trusted local plumbers, Ongaro & Sons is here to help. Call us at 415-741-2820 or request services online to schedule your plumbing service today.

Plumber using a wrench to tighten a siphon under a sink.

Our Full Range Of Plumbing Service Solutions

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.

Schedule Service

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.

Plumbing Repair Services

Plumbing issues can quickly disrupt your day. At Ongaro & Sons, we offer prompt and professional plumbing repair services to help you get back to normal—fast. Our licensed technicians have the experience to diagnose and fix a wide range of plumbing problems.

From faucet leaks and running toilets to more complex sewer line or water heater issues, we’ll provide reliable, long-lasting solutions that restore your system’s function and efficiency. No guesswork, no unnecessary upsells—just honest, expert service when you need it most.

Plumbing Installation & Replacement

Whether you’re upgrading outdated fixtures or replacing worn-out systems, Ongaro & Sons offers professional plumbing installation and replacement services tailored to your home’s needs. We install everything from water heaters and sump pumps to toilets, faucets, and complete water or sewer lines.

We’re here to make your next plumbing project stress-free and successful.

Why Choose Ongaro & Sons?

Choosing the right service provider for your plumbing needs is crucial. Serving Northern California for nearly a century, excellence is our legacy. Our well-earned reputation includes:

Local Experts Since 1932

With more than 90 years of service, Ongaro & Sons has built a reputation for trust, quality, and craftsmanship across Northern California. We proudly serve Marin, Sonoma, and Napa counties, offering deep knowledge of local plumbing codes, climate challenges, and home infrastructure—all backed by generations of community-rooted experience.

Certified, Licensed Plumbers

Certifications and Accreditations

Upfront, Honest Pricing

Fast Response Times

Customer Satisfaction Guaranteed

High Customer Retention

Comprehensive Maintenance Program

Schedule Plumbing Service Today

Whether you’re dealing with a plumbing repair need, planning a renovation, or just need routine service, Ongaro & Sons is your go-to locally owned plumbing partner. Contact us at 415-741-2820 or request services online to schedule service in Marin, Santa Rosa, and Napa counties.

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 Plans