Waterline Replacement
Waterline Replacement Services in Marin, Sonoma & Napa County
A reliable water supply is essential to your daily comfort, from drinking and cooking to bathing and laundry. But when your main waterline is old, damaged, or leaking, it can cause everything from low water pressure to costly water damage.
Ongaro & Sons can help with expert waterline replacement services that restore your water system’s integrity and efficiency, quickly, safely, and with minimal disruption. Our trustworthy team has been providing practical, cost-saving plumbing services throughout the North Bay since 1932.
Call us today at 415-741-2820 for a no-obligation consultation if your main waterline is failing.
Do You Need a Waterline Replacement?
Your main waterline is built to last decades, but corrosion, soil movement, and tree root intrusion can cause it to deteriorate faster. Here are some common signs your waterline may need replacement:
- Sudden drop in water pressure
- Unexplained water bills that keep rising
- Discolored or rusty water
- Wet spots or puddles in your yard
- Frequent leaks or pipe repairs
- Visible corrosion on exposed pipes
If you’re experiencing any of these issues, it’s time to have your plumbing system professionally inspected.
Main Waterline Replacement Process
Here’s what you can expect when you choose Ongaro & Sons to replace your waterline:
We begin by thoroughly inspecting your existing waterline using advanced diagnostic tools, including video camera inspections and electronic leak detection. This allows us to pinpoint issues such as leaks, corrosion, or root intrusion. Our licensed plumbers evaluate the line’s condition and determine whether a full replacement is needed or if repairs can suffice.
Every home is different, which is why we develop a personalized plan tailored to your property and plumbing system. We walk you through your options, such as pipe material, routing choices, and whether trenchless methods are feasible, so you know exactly what to expect. Our transparent approach ensures you’re informed and confident before any work begins.
Our experienced team performs the waterline replacement with precision, speed, and care. We use modern techniques and equipment to minimize disruption to your home and landscaping. Whether it’s a traditional excavation or a trenchless installation, we prioritize safety, cleanliness, and quality workmanship from start to finish.
After installation, we rigorously test the new waterline to confirm it meets all performance standards. We ensure optimal water flow, pressure, and leak-free operation. Once everything is functioning perfectly, we fully restore the job site, leaving your property clean, tidy, and just as we found it (if not better).
We stand behind our work; your satisfaction is always guaranteed. Our team is always here to answer questions and provide follow-up support, giving you peace of mind knowing your waterline is built to last and expertly installed.
Traditional vs. Trenchless Waterline Replacement
When it comes to replacing a damaged or aging waterline, you’ll typically have two main options: traditional or trenchless replacement.
- Traditional methods involve excavating a trench along the entire length of the pipe, which can disrupt landscaping, driveways, and walkways. While effective, this approach often results in longer project times and higher restoration costs.
- Trenchless waterline replacement, on the other hand, uses advanced techniques like pipe bursting or pipe lining to replace or reinforce the pipe without digging up your yard. This method is faster, less invasive, and often more cost-effective in the long run. It’s ideal for properties with established landscaping or hardscape features.
At Ongaro & Sons, we evaluate your property to determine the best method, ensuring minimal disruption and long-lasting results. Whether traditional or trenchless, our goal is to restore your water supply with precision and care.
Trenchless Pipe Bursting Process
The trenchless pipe bursting process begins with a camera inspection so we can properly assess your current waterline. Then, we will dig two small holes at both ends of the pipe’s location so we can feed a steel cable underground through your waterline.
Our team of experienced professionals will use the appropriate tools and equipment to simultaneously break apart the old pipes and replace them with new piping.
Schedule Your Waterline Replacement Service
A compromised water line isn’t just a plumbing issue, it’s a threat to your home’s safety, efficiency, and comfort. We proudly serve Sonoma, Marin, and Napa counties, including Penngrove, Corte Madera, Santa Rosa, and surrounding cities. Call us now at 415-741-2820 or book your appointment online for a fast, professional evaluation 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 Water Line Replacement
Water service work carries its own licence requirement, separate from the sewer side.
Schedule Service →C-34 pipeline, which the meter work requires
Santa Rosa requires a Class A or C-34 contractor for water service lateral and meter work. Ongaro & Sons holds C-34 as well as C-36.
The failure gets confirmed before the trench
A pressure test and a locate distinguish a service line leak from a pressure regulator problem or an internal fault. They present the same way on a bill.
Trenchless where the route allows
Pulling a new service through avoids opening the full length across a driveway or a mature garden.
Material chosen for the ground it goes in
Soil conditions and existing galvanised or polybutylene service decide what is appropriate. It is not one answer everywhere.
Coordinated with the water district as well as the county
Service and meter work means two authorities, not one. Managing that sequence is what keeps the water off for hours rather than days.
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.
From the Blog
May 7, 2026Ceiling Fan Direction In Summer: Which Way And Why
Ceiling fan direction for summer is counterclockwise: push air down for a wind chill effect, then raise the thermostat 4 degrees. The science.
Read More
May 1, 2026Wildfire Smoke & Indoor Air Quality In Marin & Sonoma
Wildfire smoke contains PM2.5 and toxic gases standard HVAC filters miss. What protects indoor air quality across Marin, Sonoma and Napa County.
Read More
Apr 29, 2026HVAC Permits In Marin And Sonoma County
Unpermitted work creates insurance risk and sale complications in Marin, Sonoma and Napa County. What permits protect and how to verify your contractor.
Read MoreFrequently Asked Questions
Can an RO system remove hard water minerals like calcium and magnesium?
Yes, RO systems reduce hardness-causing minerals, but they’re not a substitute for a whole-home water softener. For households with very hard water, it’s best to combine a water softener with a reverse osmosis system.
Can I install a water filtration system myself?
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.
Can I stay in my home during waterline replacement?
Yes, in most cases, you can remain at home. Water will be shut off temporarily, but professional plumbers coordinate timing to minimize disruption.
Can sediment filtration improve water taste and odor?
Sediment filters are primarily for removing visible particles. To improve taste and odor, they’re often paired with activated carbon filters or reverse osmosis systems, which target chlorine and other chemical contaminants.
Do I need a reverse osmosis system if I already have a water softener?
Yes, softeners remove minerals, while RO systems target smaller impurities and improve taste and purity.
Does my water heater need maintenance?
Yes, flushing once a year removes sediment that can reduce efficiency and damage the tank. Annual inspections can also review the exterior for corrosion or leaks around connections and ensure the pressure is where it should be.
How do I know if I need a water softener?
Signs include soap scum, stiff laundry, cloudy dishes, and frequent scale buildup on faucets and appliances.
How do I know if I need a waterline replacement?
Frequent leaks, reduced water pressure, or discolored water are signs your main water line may need replacement.
How long should a water heater last?
Most conventional water heaters last 8–12 years. Tankless units can last 15–20 years with proper maintenance.
How often does a reverse osmosis system need maintenance?
RO systems require filter changes every 6–12 months, depending on water quality and usage. The RO membrane typically needs to be replaced every 2–3 years. Routine maintenance ensures optimal performance and water quality.
Is reverse osmosis water safe for cooking and drinking?
Yes, RO water is highly purified, making it ideal for drinking, cooking, ice cubes, and even baby formula.
Is sediment filtration necessary if I already have a water softener or RO system?
Yes. Sediment filters are essential even with a softener or reverse osmosis system. They act as a pre-filter, protecting more sensitive systems from clogging or premature wear caused by particulate matter.