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Find Water main install, replace or repairers in Diablo

Avatar for Corsa Plumbing and Rooter

Corsa Plumbing and Rooter

4.55(
51
)
•Approved Pro

Corsa Plumbing and Rooter

4.55(
51
)
•Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
11 local quotes requested

Don't flush your money down the drain when your plumbing goes out! Trust Corsa Plumbing and Rooter to get it done right. We are available for you day or night for all types of plumbing service.

"I feel that I was very lucky have chosen Corsa Plumbing to do diagnose and replace 2 sewers for me. One in Lafayette and one in Pleasant Hill. Ray, was easy to work with and he did a great job of advising me on the existing problems and explaining what they would do to fix them. The camera inspection of the sewer line and the estimate were free. I was present when he did them. Both of the bids were fair, but do not include the cost of County permits. I will highly recommend you get a bid from Corsa Plumbing. You won’t regret it. You can hardly tell that the sewer was replaced Steve Walsh, retired Realtor and property manager for residential homes."

steve w on August 2025

Don't flush your money down the drain when your plumbing goes out! Trust Corsa Plumbing and Rooter to get it done right. We are available for you day or night for all types of plumbing service.

"I feel that I was very lucky have chosen Corsa Plumbing to do diagnose and replace 2 sewers for me. One in Lafayette and one in Pleasant Hill. Ray, was easy to work with and he did a great job of advising me on the existing problems and explaining what they would do to fix them. The camera inspection of the sewer line and the estimate were free. I was present when he did them. Both of the bids were fair, but do not include the cost of County permits. I will highly recommend you get a bid from Corsa Plumbing. You won’t regret it. You can hardly tell that the sewer was replaced Steve Walsh, retired Realtor and property manager for residential homes."

steve w on August 2025

Avatar for R Plumbing Companies, Inc.

R Plumbing Companies, Inc.

5.00(
3
)
•Approved Pro

R Plumbing Companies, Inc.

5.00(
3
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the baasis of our business

"Helped me right away. Did not have to wait all day."

Julie H on September 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the baasis of our business

"Helped me right away. Did not have to wait all day."

Julie H on September 2023

Avatar for OCEAN PLUMBING

OCEAN PLUMBING

5.00(
5
)
•Approved Pro

OCEAN PLUMBING

5.00(
5
)
•Approved Pro
Super Service Award
14 years of experience
Free onsite estimate

Ocean Plumbing is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

"Eddie was very knowledgeable, thorough, and did a great job. "

Tomas E on February 2026

Ocean Plumbing is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

"Eddie was very knowledgeable, thorough, and did a great job. "

Tomas E on February 2026

Avatar for Albert Nahman Plumbing, Heating, and Cooling

Albert Nahman Plumbing, Heating, and Cooling

4.63(
622
)
•Approved Pro

Albert Nahman Plumbing, Heating, and Cooling

4.63(
622
)
•Approved Pro
Customers say: Super punctual
29 local quotes requested
45 years of experience

Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!

"The crew from Albert Nahman did a great job from start to finish. The project was to replace the original ductwork in our 60 year old house. Tom provided excellent advice for the estimate then Bryan’s crew did the job, 2 days, within a week of my acceptance of the proposal. Great work."

Jeff V on February 2026

Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!

"The crew from Albert Nahman did a great job from start to finish. The project was to replace the original ductwork in our 60 year old house. Tom provided excellent advice for the estimate then Bryan’s crew did the job, 2 days, within a week of my acceptance of the proposal. Great work."

Jeff V on February 2026

Avatar for Oak Plumbing Inc

Oak Plumbing Inc

4.68(
85
)
•Approved Pro

Oak Plumbing Inc

4.68(
85
)
•Approved Pro
Super Service Award
Customers say: Quick response
10 years of experience
Free onsite estimate

Oak Plumbing is a locally owned and operated plumbing company serving Solano, Marin & Contra Costa Counties. We provide options to prevent, repair, and maintain your water system to best fit your family’s needs. Our goal is to bring customer service back to the plumbing industry. We specialize in residential plumbing repair as well as preventative maintenance. We offer up-front pricing and also Pace financing to be able to service everyone equally. We want to fix the cause of the problem, not just the symptom. Safety is extremely important to us which is why all our technicians are fully trained, background checked, and drug tested.

"Kitchen drain line backup. They cleared it like a champ!"

francis b on February 2026

Oak Plumbing is a locally owned and operated plumbing company serving Solano, Marin & Contra Costa Counties. We provide options to prevent, repair, and maintain your water system to best fit your family’s needs. Our goal is to bring customer service back to the plumbing industry. We specialize in residential plumbing repair as well as preventative maintenance. We offer up-front pricing and also Pace financing to be able to service everyone equally. We want to fix the cause of the problem, not just the symptom. Safety is extremely important to us which is why all our technicians are fully trained, background checked, and drug tested.

"Kitchen drain line backup. They cleared it like a champ!"

francis b on February 2026

Avatar for Fito Plumbers, Inc.

Fito Plumbers, Inc.

4.94(
53
)
•Approved Pro

Fito Plumbers, Inc.

4.94(
53
)
•Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
36 local quotes requested

Fito Plumbers is a family-owned and operated plumbing company which has been servicing the bay area for over 20 years. We serve both residential and commercial properties. We strive to provide the best customer service and support. Our teams consist of experienced and qualified service technicians which use high quality equipment and extensive knowledge to get any job done. Our goal is to provide outstanding services, quality, and put the customer first to complete the project. Our prices are very competitive and our service is superior. We take pride in what we do and the care we provide to our customers. Call us now!

"Fito pluming provided excellent service at reasonable cost. Service was provided on time with no cost overrun. All personnel were courteous and respectful of my property."

Robert M on January 2026

Fito Plumbers is a family-owned and operated plumbing company which has been servicing the bay area for over 20 years. We serve both residential and commercial properties. We strive to provide the best customer service and support. Our teams consist of experienced and qualified service technicians which use high quality equipment and extensive knowledge to get any job done. Our goal is to provide outstanding services, quality, and put the customer first to complete the project. Our prices are very competitive and our service is superior. We take pride in what we do and the care we provide to our customers. Call us now!

"Fito pluming provided excellent service at reasonable cost. Service was provided on time with no cost overrun. All personnel were courteous and respectful of my property."

Robert M on January 2026

Avatar for Pipe Systems and Solutions

Pipe Systems and Solutions

5.00(
6
)
•Approved Pro

Pipe Systems and Solutions

5.00(
6
)
•Approved Pro
11 local quotes requested
2 years of experience

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"Excellent experience with Pipe Systems and Solutions. Marvin did high quality work and was friendly, professional, and easy to work with. Would definitely hire again! "

Jas S on February 2026

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"Excellent experience with Pipe Systems and Solutions. Marvin did high quality work and was friendly, professional, and easy to work with. Would definitely hire again! "

Jas S on February 2026

Avatar for TrenchFree, Inc.

TrenchFree, Inc.

5.00(
1
)
•Approved Pro

TrenchFree, Inc.

5.00(
1
)
•Approved Pro
14 years of experience
Free onsite estimate

TrenchFree is a leading underground non-disruptive plumbing and utility services company specializing in the installation, repair, and replacement of sewer mains, water lines, gas lines, and electrical conduits. We provide expert trenchless solutions designed to minimize disruption while ensuring long-lasting, high-quality results. Our team is committed to efficiency, precision, and customer satisfaction, serving both residential and commercial clients with reliable and cost-effective plumbing solutions.

TrenchFree is a leading underground non-disruptive plumbing and utility services company specializing in the installation, repair, and replacement of sewer mains, water lines, gas lines, and electrical conduits. We provide expert trenchless solutions designed to minimize disruption while ensuring long-lasting, high-quality results. Our team is committed to efficiency, precision, and customer satisfaction, serving both residential and commercial clients with reliable and cost-effective plumbing solutions.

Avatar for Oak Plumbing

Oak Plumbing

4.63(
471
)
•Approved Pro

Oak Plumbing

4.63(
471
)
•Approved Pro
Super Service Award
Customers say: True professional
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
10 years of experience

Oak Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Our customer's safety is extremely important, which is why all of our technicians are fully trained, background checked, and drug tested.

"Expensive but thorough. There was a minor scheduling issue that was quickly resolved, and the job was completed VERY quickly. "

Roger F on January 2026

Oak Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Our customer's safety is extremely important, which is why all of our technicians are fully trained, background checked, and drug tested.

"Expensive but thorough. There was a minor scheduling issue that was quickly resolved, and the job was completed VERY quickly. "

Roger F on January 2026

Avatar for Beastbay Plumbing

Beastbay Plumbing

4.66(
189
)
•Approved Pro

Beastbay Plumbing

4.66(
189
)
•Approved Pro
Super Service Award
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
132 local quotes requested

Welcome to Beastbay Plumbing! We are committed to exceeding your expectations. We specialize in all plumbing needs. Whether its a regular or On Demand water heater, water filtration or water/drain re-pipe we can handle the job. We will always give you more that one option and guarantee customer satisfaction. We take pride in diagnosing problems and offering solutions that fit your needs. You can book appointment here (highlight, copy and paste link): https://bit.ly/3SxIfar

"Good experience "

Leiloni M on December 2025

Welcome to Beastbay Plumbing! We are committed to exceeding your expectations. We specialize in all plumbing needs. Whether its a regular or On Demand water heater, water filtration or water/drain re-pipe we can handle the job. We will always give you more that one option and guarantee customer satisfaction. We take pride in diagnosing problems and offering solutions that fit your needs. You can book appointment here (highlight, copy and paste link): https://bit.ly/3SxIfar

"Good experience "

Leiloni M on December 2025

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FAQs for water main install, replace or repair projects in Diablo, CA

If you notice puddles or standing water in your yard, a sudden drop in water pressure, cracks forming in your foundation, frequent clogs in your plumbing fixtures, or water that looks or smells unusual, you might have a leak in your main water line. These signs mean it's time to call a professional to evaluate the issue and prevent further damage.

A professional water main inspection is a comprehensive evaluation performed by a licensed plumber who checks every section of your plumbing system. The inspection costs $165 and uses advanced diagnostic techniques to identify hidden leaks or wear. This service clarifies the exact condition of your water main, enabling precise repairs that prevent future damage and ensure the overall health of your plumbing system.

Protect your water main by scheduling a cleaning and inspection every two to five years. The average cost of a sewer line cleaning is $400. It’s also important to never dig in your yard without first calling the dig line (811) to ensure you don't accidentally hit the water or sewer lines. Watch for soil erosion, low water pressure, or wet spots in your yard, and take immediate action if you suspect a leak. Remember, the longer you leave it, the worse the problem gets and the more costly it is to fix.

When properly maintained, your water main is engineered to remain functional for 50 years or longer. A durable water service in excellent condition should consistently perform without major issues for half a century. In contrast, metal pipes exposed to acidic soil corrode faster, whereas modern plastic pipes resist corrosion and function for decades beyond metal alternatives. Regular maintenance and inspections are essential for confirming your system’s longevity.

No, homeowners insurance does not cover the cost to repair a water main. Insurers fund only sudden, unforeseen events like a burst pipe and exclude gradual issues or normal wear and tear. Damage resulting from leaks, such as mold remediation or property claims, is not covered. It is essential to contact your insurance provider immediately to confirm your policy’s details and any potential adjustments needed.

The Diablo, CA homeowners’ guide to water main install, replace or repairs

From average costs to expert advice, get all the answers you need to get your job done.

See all articles