Reliability and efficiency are essential when it comes to your home's water system. From improving your home’s water quality with advanced filtration systems to replacing outdated fixtures, repairing leaks, or installing water treatment systems, Ongaro & Sons brings the experience and care your home deserves.
Our licensed plumbers are trained to handle everything from routine maintenance to complex water system installations and repairs.
We understand that no two homes are the same, which is why we tailor our plumbing solutions to your specific needs. With a focus on energy efficiency, safety, and long-lasting results, we’re here to help you make the most of your home’s water systems in Northern California.
Trusted Plumbing Expertise From Ongaro & Sons Since 1932
At Ongaro & Sons, we proudly offer comprehensive water system services throughout Marin, Sonoma, and Napa counties, including cities like Bodega Bay, San Rafael, Novato, Corte Madera, and Kenwood.
Our PHCC-certified plumbing experts are committed to delivering clean, efficient, and reliable water solutions for your home, backed by over 90 years of trusted service.
Water Filtration and Treatment Services
Safe, clean water is essential for your family’s health. We offer several water treatment solutions tailored to address local water quality concerns:
Reverse osmosis systems use a multi-stage filtration process to remove up to 99% of harmful contaminants like lead, chlorine, arsenic, and bacteria. This system delivers clean, fresh-tasting water straight from your tap, making it ideal for drinking, cooking, and protecting your family’s health with every glass.
Learn More About Reverse Osmosis
Our team will assess your water supply and recommend the best solution based on your home’s needs. Plus, we offer water treatment maintenance to ensure your system continues operating at peak performance.
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.
Water Heater Services
From hot showers to clean dishes, your water heater is one of the hardest-working appliances in your home. Ongaro & Sons offers expert water heater installation, repair, and maintenance services for both traditional tank and tankless units.
We service and install energy-efficient models from top brands and help you choose the right size and fuel type (gas, electric, or hybrid) for your household. Our plumbers also provide regular tune-ups to reduce energy costs, prevent breakdowns, and extend your water heater’s life.
Signs you may need water heater service:
- Lukewarm or inconsistent hot water
- Unusual noises like popping or rumbling
- Rust-colored water or leaks near the tank
Don’t wait for a cold shower—contact our licensed pros today for dependable service.
Radiant Floor Heating
Enjoy even, efficient warmth under your feet with radiant floor heating. Ideal for bathrooms, kitchens, and entire homes, radiant systems use warm water running through pipes beneath your flooring to heat the space from the ground up.
Compared to forced-air heating, radiant systems are:
- Quieter
- More energy-efficient
- Better for indoor air quality (no blown dust or allergens)
Our technicians handle everything from new installations to maintenance and repairs, ensuring comfort you can feel from the floor up.
Lawn Irrigation Systems
Keep your yard lush and green with a professionally installed lawn irrigation system. Ongaro & Sons designs water-efficient systems that deliver just the right amount of water where and when your landscape needs it.
We specialize in the following lawn irrigation systems:
- Sprinkler installation and repairs
- Drip irrigation for gardens and planters
- Smart controllers for automated watering
- Leak detection and seasonal maintenance
Whether you’re upgrading an outdated system or installing irrigation for a new home, we’ll help you save water, time, and money.
Water Line Replacement
If you’re experiencing low water pressure, discolored water, or unexplained wet spots in your yard, your main water line may need repair or replacement. Over time, aging pipes can corrode, crack, or become blocked by tree roots.
Our experienced plumbers use modern techniques—including trenchless methods where possible—to minimize disruption to your property while restoring your water supply quickly and safely. We’ll inspect the line, explain your options, and perform a durable, code-compliant installation with upfront pricing.
Why Choose Ongaro & Sons?
When it comes to plumbing and water system services, you deserve a team you can trust. At Ongaro & Sons, we combine decades of experience with top-tier service to deliver lasting results. Here’s what sets us apart:
For over 90 years, Ongaro & Sons has proudly served Northern California homeowners with reliable plumbing and water system solutions. Our long-standing reputation is built on quality work, honest service, and lasting customer relationships.
Schedule Your Water System Service Today
Whether you need a new water heater, help with hard water, or full water line replacement, Ongaro & Sons is ready to help. We proudly serve Marin, Sonoma, and Napa counties, including nearby communities of Northern California.
Call us today at 415-741-2820 or [request service online] to schedule your water system service. Let us help keep your water clean, your home efficient, and your comfort uninterrupted.
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
Basic under-sink units can be DIY, but whole-house systems should be installed by a licensed plumber to ensure proper connections and code compliance.