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One Source Plumbing and Rooter, Inc.

Plumbing
|
San Francisco  San Mateo Counties
Diamond Certified Company Report
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One Source Plumbing and Rooter, Inc.
108 SURVEYS
  • star image
  • star image
  • star image
  • star image
  • star image
  • Rating
9 CONSECUTIVE YEARS
SINCE MAY 2016
CERT 2361

Diamond Certified Ratings Dashboard

108

Verified Customers

Surveyed

Customer Loyalty

Customer Satisfaction

Helpful Expertise

READ ALL 108 SURVEY RESPONSES

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • License Verification
  • Legal & Finance

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Diamond Certified Company Report SUMMARY UPDATE April 2025

Company summary image
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One Source Plumbing and Rooter, Inc.

Rated Highest in Quality and Helpful Expertise for 9 Consecutive Years.

Quick Summary

  • Diamond Certified since 2016
  • Installs, maintains, and repairs plumbing systems for residential and commercial clients throughout the San Francisco Peninsula
  • Offers free estimates
  • 24/7 emergency service available

Top News Updated

COMPANY MILESTONES

One Source Plumbing and Rooter, Inc. is celebrating its 12th anniversary in 2025.

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Top Survey Responses

From a recent Diamond Certified Survey Response: “I [had] an emergency and they were the only ones who picked up [the phone]. They were able to send someone out quickly...

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From a recent Diamond Certified Survey Response: “When we had leakage issues from the pipe underneath our kitchen sink, they walked us through why it was happening, fixed the problem and told us how to prevent it. [They were] very personable, detailed and professional.”

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Trending Projects

One Source Plumbing and Rooter, Inc. recently completed a toilet replacement job for a homeowner in San Francisco. The client was particularly impressed by the speed at which the company...

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One Source Plumbing and Rooter, Inc.
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Diamond Certified Researched Articles on One Source Plumbing and Rooter, Inc.

researched article

A recent plumbing installation by One Source Plumbing and Rooter

One Source Plumbing and Rooter, Inc. provides a complete range of plumbing services for residential and commercial clients throughout the San Francisco Peninsula. The company has the training and equipment to install and repair all types of plumbing systems, and its technicians are available 24/7 to handle emergencies.

Owner Mostafa Sowadah says One Source Plumbing and Rooter’s customer-oriented approach to plumbing has been an important part of its continued success. “We’re known for having good chemistry with our customers—we pay attention to details and make recommendations that we know they’ll appreciate. Plumbing problems can be stressful, but our customers know that once they call us, we’ll be there to take care of everything.”

One Source Plumbing and Rooter focuses on performing “long-term fixes” that maximize the life span of its customers’ plumbing systems. “We want our work to be here long after we’re gone, so we take a lot of pride in finding the best solutions for each situation,” says Mr. Sowadah. “We don’t take shortcuts; we believe good, honest work will lead to a loyal clientele base that’s quick to refer us to others.”

“We understand how hard our customers work for their money, so we focus on providing them with high-quality, reasonably priced services that leave them completely satisfied. We don't just quickly fix something and move on–we take the time to explain our work and do everything we can to help the customer save on future repairs.”

Thanks to recent industry innovations, many once-complex and time-consuming plumbing processes now have faster, simpler solutions. “The plumbing industry is constantly changing, from products and techniques to code regulations, so it’s important for a plumber to stay up-to-date with these developments,” says Mostafa Sowadah, owner of One Source Plumbing and Rooter, Inc. in San Francisco. “A plumber who’s current with industry trends will be able to offer the latest and greatest technological innovations.”

One such innovation Mr. Sowadah points out is Ridgid’s ProPress copper piping system. “ProPress is a recent innovation for fitting pipes that’s becoming huge in the industry,” he says. “In the past, pipes had to be welded together with a blowtorch, but the ProPress system utilizes special fittings that tighten securely to the pipe when pressed on by the ProPress machine. In addition to saving a lot of time, it reduces the risk of fire or burns from welding. The only downside is it’s a system, so you have to purchase the ProPress machine and use compatible pipe fittings, which are more expensive than standard fittings. That being said, the time saved typically offsets these additional costs.”

Even though it’s not as recent, another innovation that’s had a substantial impact on the way plumbers work on sewers is trenchless line replacement. In the past, in order to replace a broken sewer pipe, plumbers had to excavate the full extent of the pipe. This meant any area of the home that the pipe ran beneath (lawn, sidewalk, patio, driveway) had to be torn up, which resulted in a disruptive, time-consuming and extensive job.

With trenchless line replacement, plumbers now only need to dig two holes: one at each end of the pipe section being replaced. This allows the new pipe (typically a flexible, high-density polyethylene) to be pulled through from one end to the other, using the old pipe as a guide. “Many people still aren’t familiar with trenchless sewer replacement, but they’re always appreciative of it when they learn how the old method works,” says Mr. Sowadah.

Maintaining customer satisfaction is a crucial aspect of any business, but it's even more important for plumbing companies that have earned the prestigious Diamond Certified award. For One Source Plumbing and Rooter, Inc., the best way to achieve customer satisfaction is to take the long view on every job, regardless of its size. "We take a lot of pride in our work, which is why we never take shortcuts," says owner Mostafa Sowadah. "We're not concerned about short-term profits or quick turnovers–at the end of the day, quality work and customer satisfaction are the things that generate our long-term success."

One Source Plumbing and Rooter has been providing plumbing services for residential and commercial clients throughout the San Francisco Peninsula since 2013. The company has the in-house capabilities to install and repair all types of plumbing systems, and it offers 24/7 emergency service for the convenience of its customers.

Unlike less experienced plumbing companies that take an "assembly line" approach to every job, One Source Plumbing and Rooter focuses on building relationships with its customers and helping them get the most value out of their plumbing projects. "As a small business that has built itself from the ground up, we understand the value of the dollar and know how hard our customers work for their money," says Mr. Sowadah. "So, instead of overcharging them and hurrying through their jobs, we take the time to provide them with quality work at reasonable prices."

Another distinguishing attribute of One Source Plumbing and Rooter is its ability to provide customized solutions for a wide variety of plumbing issues. "With our industry knowledge and experience, we can find solutions to even the most complex and unusual problems," says Mr. Sowadah. "On top of that, we do our best to offer economical alternatives for budget-sensitive customers. We want our customers to know that once they call us, we'll be there to take care of everything."

Owner Mostafa Sowadah (L) and Partner Larry Cane-One Source Plumbing and Rooter, Inc.Owner Mostafa Sowadah (L) and Partner Larry Cane

Diamond Certified Researched Capabilities on One Source Plumbing and Rooter, Inc.

Service Area

serving area
The San Francisco Peninsula
Serving the San Francisco Peninsula, Including Excelsior, Sunset District, Mission District, Bernal Heights, North Beach and Bayview District

Main Services

Plumbing
  • Commercial Plumbing
  • Drain Cleaning
  • Emergency Plumber
  • Gas Pipe Repair
  • Leak Detection
  • Plumbing Services
  • Sewer Pipe
  • Toilet Repair
  • Water Heater Installation
  • Water Heater Repair
  • Water Heater Replacement
  • Water Lines

Additional Services

Plumbing Installation, Maintenance & Repair
Water Heater Repair & Replacement
Drain Cleaning

Company Info

Hours
Mon
12:00 am - 11:59 pm
Tue
12:00 am - 11:59 pm
Wed
12:00 am - 11:59 pm
Thu
12:00 am - 11:59 pm
Fri
12:00 am - 11:59 pm
Sat
12:00 am - 11:59 pm
Sun
12:00 am - 11:59 pm
Open Now
Available 24/7
Website
Contact
One Source Plumbing and Rooter, Inc.

Capabilities Table

Company Name
One Source Plumbing and Rooter, Inc.
Phone Number
DCID Number
DCID4155703646
Managers
Mostafa Sowadah, Owner
Years in Industry
6 (Manager)
# of Employees
1
License
988995
Insurance
Liability Insurance,
Workers' Compensation
Founded
2013
Customer Type
Commercial, Residential
Payment Accepted
american express,
discover,
mastercard,
visa

Certifications & Awards

diamond certified logo

Brands

capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award

Key Factors

One Source Plumbing and Rooter, Inc. Emergency 24/7
Emergency 24/7
One Source Plumbing and Rooter, Inc. Residential & Commercial
Residential & Commercial
One Source Plumbing and Rooter, Inc. Weekend Hours
Weekend Hours
One Source Plumbing and Rooter, Inc. Free Estimates
Free Estimates
One Source Plumbing and Rooter, Inc. Appointments Available
Appointments Available
One Source Plumbing and Rooter, Inc. Diamond Certified Expert Contributor
Diamond Certified Expert Contributor

Select Photos From One Source Plumbing and Rooter, Inc.

1 of 6Picture of An example of One Source Plumbing and Rooter's laundry hook-up work - One Source Plumbing and Rooter, Inc.
An example of One Source Plumbing and Rooter's laundry hook-up work
Picture of An example of One Source Plumbing and Rooter's laundry hook-up work - One Source Plumbing and Rooter, Inc.
Picture of One Source Plumbing and Rooter installed this trench drain to protect a customer's garage from rainwater. - One Source Plumbing and Rooter, Inc.
Picture of One Source Plumbing and Rooter set up this sewer for future access. - One Source Plumbing and Rooter, Inc.
Picture of One Source Plumbing and Rooter worked on this sewer that runs at an angle. - One Source Plumbing and Rooter, Inc.
Picture of A One Source Plumbing and Rooter technician works on a sewer line installation. - One Source Plumbing and Rooter, Inc.
Picture of A recent bathroom remodeling project by One Source Plumbing and Rooter - One Source Plumbing and Rooter, Inc.

Diamond Certified Expert Contributor Advice & Tips

Mostafa Sowadah is a veteran of the plumbing industry and owner of One Source Plumbing and Rooter, Inc., a Diamond Certified company. He can be reached at (415) 340-2353 or by email.

Mostafa Sowadah is a veteran of the plumbing industry and owner of One Source Plumbing and Rooter, Inc., a Diamond Certified company. He can be reached at (415) 340-2353 or by email.

Mostafa Sowadah: One Source for Success

By James Florence, Diamond Certified Resource Reporter

SAN FRANCISCO — Following high school, Mostafa Sowadah knew he wanted to get into a trade—it was just a matter of deciding which one to pursue. “When I was enrolling in trade school, I had the choice of going into automotive, plumbing or HVAC,” he says. “Based on what I saw most people signing up for, it seemed that plumbing was the least popular option. However, I’d always heard good things about plumbing, so I decided to give it...

Read Full Article - Mostafa Sowadah: One Source for Success

One Source Plumbing and Rooter, Inc. Website and External Feeds

Social Media Links

Company Suggested Links

FAQs

By One Source Plumbing and Rooter, Inc.

Can you tell me if my home’s plumbing is up to code?

Do you repipe houses?

I have an antique plumbing fixture—does it need to be replaced or can it be repaired?

Do you provide a warranty on sewer work?

One Source Plumbing and Rooter, Inc. Ratings and Survey Responses

diamondcertified logo
One Source Plumbing and Rooter, Inc.
108 SURVEYS
  • star image
  • star image
  • star image
  • star image
  • star image
  • Rating
9 CONSECUTIVE YEARS
SINCE MAY 2016
CERT 2361

Diamond Certified Ratings Dashboard

Customer Satisfaction

Customer Loyalty

Helpful Expertise

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • License Verification
  • Legal & Finance

Phone Survey Responsesfrom 108 Verified Customers

Zane C.

Mo is the man. I'd recommend him hands down. I think the worst and best way to put it is when it comes down to the dirty terrible things they have to do, they don't sugar coat it, but just help with those problems. When it comes to sewage, they're the best. They unclog drains, tell us about it, and they are so helpful towards us afterwards.

They're incredibly friendly. They have a good understanding of the situation. They're hands on, told us what the problem was and how to fix it in the future so that it won't happen again. They were the third person we called, and I can't say this enough, but they're totally awesome.

Verified Customer of One Source Plumbing and Rooter, Inc., 1 of 108

10 Quality
Yes Loyalty
Stephen D.

They're very honest, hardworking, and efficient.

They're straight talkers, efficient, and fast workers. I had a great experience with them.

Verified Customer of One Source Plumbing and Rooter, Inc., 2 of 108

10 Quality
Yes Loyalty
Erin S.

They provided fast and good service.

It was easy to set up the appointment, they arrived on time, and they cleaned up after themselves.

Verified Customer of One Source Plumbing and Rooter, Inc., 3 of 108

10 Quality
Yes Loyalty
Jasmine C.

I was in an emergency and they were the only ones who picked up. They were able to send someone out quickly and they went above and beyond when they HOA wanted to blame me. They were really thorough and he was really nice.

They were really professional and it didn't feel like they were trying to nickel and dime me. It felt like they were taking every concern seriously and they let me ask them questions.

Verified Customer of One Source Plumbing and Rooter, Inc., 4 of 108

10 Quality
Yes Loyalty
U.H.

I've told several people about him. He is the most reliable plumber. He's extremely knowledgeable, skillful, and just has an incredible amount of expertise in his work. The quality of service was amazing also.

I think I liked his expertise and his customer service. He is a decent and nice person. Mostafa is the most amazing plumber.

Verified Customer of One Source Plumbing and Rooter, Inc., 5 of 108

10 Quality
Yes Loyalty
Janice M.

The problem wasn't as intuitive as it first seemed, but they stuck with it. They came back three times to fix it and third time was the charm. The price was as if they had only come out for one visit.

I think it was the humanness of it, when they weren't able to fix it the first time, they came out two additional times to try and get it fixed.

Verified Customer of One Source Plumbing and Rooter, Inc., 6 of 108

10 Quality
Yes Loyalty
Robert K.

They fixed our back-up sewer. They were reasonably priced, prompt, and they got the job done within a short amount of time. There was one delay, but that was because of an inspector issue.

I like to support local businesses.

Verified Customer of One Source Plumbing and Rooter, Inc., 7 of 108

10 Quality
Yes Loyalty
Stauret D.

I told my boss that they did a good job. I already recommended them. They came right away, and they immediately knew what the problem was and how to fix it.

They are very knowledgeable of the work in their field. They were very familiar with the problem I had, and other customers have told me the same thing about them. They fixed everything more than 100% for me. I'm very satisfied with their work.

Verified Customer of One Source Plumbing and Rooter, Inc., 8 of 108

10 Quality
Yes Loyalty
Agatha L.

I would tell them to use them. It was really easy to get them to come in. They do their job as fast as possible, and it is great quality.

Their availability is flexible.

Verified Customer of One Source Plumbing and Rooter, Inc., 9 of 108

10 Quality
Yes Loyalty
Katherine R.

They made a mistake, but they fixed it, and they were very honest about it. They are a very upstanding company and very trustworthy.

Their trustworthiness

Verified Customer of One Source Plumbing and Rooter, Inc., 10 of 108

10 Quality
Yes Loyalty
Avery A.

We've used them two or three times before and we have been satisfied every time with the quality. They are our go-to plumber now.

They were on time, efficient and answered our questions. The quality stands every time.

Verified Customer of One Source Plumbing and Rooter, Inc., 11 of 108

10 Quality
Yes Loyalty
Bobby N.

Mostafa worked hard. He worked through some difficult problems with old plumbing. He was persistent and good at what he did.

I liked that he persisted and got the job done.

Verified Customer of One Source Plumbing and Rooter, Inc., 12 of 108

10 Quality
Yes Loyalty
Jackie V.

I thought he was professional and he did a good job. He was on time, quick and efficient. He was quiet.

The service was good and he got there on time. He fixed it and the price was reasonable.

Verified Customer of One Source Plumbing and Rooter, Inc., 13 of 108

10 Quality
Yes Loyalty
Gabriel

They have a good response time, and they usually have a permanent solution for whatever the problem is.

Their reliability

Verified Customer of One Source Plumbing and Rooter, Inc., 14 of 108

10 Quality
Yes Loyalty
Matthew A.

If I ever have problems again, I'd call them and I'd recommend them to anyone who's having issues.

Got the job done with no hassle, they were in and out.

Verified Customer of One Source Plumbing and Rooter, Inc., 15 of 108

10 Quality
Yes Loyalty
Joseph S.

The problem was fixed, and it never came back. That was good. They did the job they needed to do.

They showed up in a hurry. The guy rushed the job and was in and out in an hour.

Verified Customer of One Source Plumbing and Rooter, Inc., 16 of 108

10 Quality
Yes Loyalty
Kim A.

They responded very quickly and they fixed the problem and they were in and out quickly.

He is very responsive and he came out within an hour.

Verified Customer of One Source Plumbing and Rooter, Inc., 17 of 108

10 Quality
Yes Loyalty
Christopher B.

There was a problem, and they were able to figure it out without costing me a fortune.

They were great and very professional. They found a solution to my problem that didn't cost me more money.

Verified Customer of One Source Plumbing and Rooter, Inc., 18 of 108

10 Quality
Yes Loyalty
Marcus H.

It was a great experience, and they got the job done professionally and promptly.

The got the job in a very timely manner. I called them, and they came out the same day.

Verified Customer of One Source Plumbing and Rooter, Inc., 19 of 108

10 Quality
Yes Loyalty
Jake M.

It was straightforward, honest and attentive. They have very reasonable pricing.

The honesty and clear perspective on what my options were, what needed to happen and the prices

Verified Customer of One Source Plumbing and Rooter, Inc., 20 of 108

10 Quality
Yes Loyalty
Joseph M.

I would highly recommend them. They are reliable and do excellent quality work.

He was very detailed and had many options, especially with the water heater.

Verified Customer of One Source Plumbing and Rooter, Inc., 21 of 108

10 Quality
Yes Loyalty
Laura

We just really enjoyed their service, and we have recommend them to others.

When we needed them, they were there.

Verified Customer of One Source Plumbing and Rooter, Inc., 22 of 108

10 Quality
Yes Loyalty
William

I'd say to use them. They're very good, very fast, and very professional.

I liked the speed in which they got it done. It was done very quickly.

Verified Customer of One Source Plumbing and Rooter, Inc., 23 of 108

10 Quality
Yes Loyalty
Timothy G.

Give them your issue and see if they can solve it. They usually can.

The owner was there himself, instead of other employees, and he always solved my problems.

Verified Customer of One Source Plumbing and Rooter, Inc., 24 of 108

10 Quality
Yes Loyalty
Jenifer S.

They showed up when I needed them to, and they fixed our problem.

They fixed our problem immediately.

Verified Customer of One Source Plumbing and Rooter, Inc., 25 of 108

10 Quality
Yes Loyalty
Cristine S.

They did a fantastic job. It was quick, and the price was great.

The communication

Verified Customer of One Source Plumbing and Rooter, Inc., 26 of 108

10 Quality
Yes Loyalty
Lana B.

They were easy to work with, and I'd definitely recommend them.

I liked how easy it was to get ahold of them and how quickly they were able to provide their services. They were great.

Verified Customer of One Source Plumbing and Rooter, Inc., 27 of 108

10 Quality
Yes Loyalty
Mary J.

I would say that they are responsive, knowledgeable, and fast.

They are responsive.

Verified Customer of One Source Plumbing and Rooter, Inc., 28 of 108

10 Quality
Yes Loyalty
Gia S.

I think they were great, responsive, and they got the job done.

It was really easy to work with them. They were great for the job we had.

Verified Customer of One Source Plumbing and Rooter, Inc., 29 of 108

10 Quality
Yes Loyalty
Mike Z.

They did what I hired them to do, so what more can you ask?

It was a fast job.

Verified Customer of One Source Plumbing and Rooter, Inc., 30 of 108

10 Quality
Yes Loyalty
Detour S.

They were really helpful, quick, and they got the job done.

I like how quick and easy it was to work with them. They're great.

Verified Customer of One Source Plumbing and Rooter, Inc., 31 of 108

10 Quality
Yes Loyalty
Adam M.

He was very efficient, fair and did high quality work.

The customer service is good and he explains the options well.

Verified Customer of One Source Plumbing and Rooter, Inc., 32 of 108

10 Quality
Yes Loyalty
Gina F.

He is reliable and he answers quickly to phone calls.

He is on time, reliable and he explains everything.

Verified Customer of One Source Plumbing and Rooter, Inc., 33 of 108

10 Quality
Yes Loyalty
Daniel

They were fast, efficient, and cheaper than the rest.

They were fast and efficient.

Verified Customer of One Source Plumbing and Rooter, Inc., 34 of 108

10 Quality
Yes Loyalty
Garrett G.

They have the right price, and the work is done fast.

The job was done well.

Verified Customer of One Source Plumbing and Rooter, Inc., 35 of 108

10 Quality
Yes Loyalty
Kim A.

I'd tell people to use them. They're very helpful.

He's efficient. He came right out to help us.

Verified Customer of One Source Plumbing and Rooter, Inc., 36 of 108

10 Quality
Yes Loyalty
Connor S.

They're good people to call if you have an issue.

They have fast response times.

Verified Customer of One Source Plumbing and Rooter, Inc., 37 of 108

10 Quality
Yes Loyalty
Michell

They were professional, responsive, and friendly.

They were professional, responsive, and friendly.

Verified Customer of One Source Plumbing and Rooter, Inc., 38 of 108

10 Quality
Yes Loyalty
Wendy W.

They were fast, efficient and reasonably priced.

The service was good.

Verified Customer of One Source Plumbing and Rooter, Inc., 39 of 108

10 Quality
Yes Loyalty
Iman H.

They were great to use. I would recommend them.

The gentleman who helped me seemed helpful and was very thorough. He provided the exact service I asked him to do and answered all of my questions.

Verified Customer of One Source Plumbing and Rooter, Inc., 40 of 108

10 Quality
Yes Loyalty
Aiden S.

Very personable, very detailed and professional

When we had leakage issues from the pipe underneath our kitchen sink, he was able to come out, walk us through why it was happening, fixed the problem and told us how to prevent it.

Verified Customer of One Source Plumbing and Rooter, Inc., 41 of 108

10 Quality
Yes Loyalty
Airwave

They went above and beyond to resolve my issue.

The personalized service was great.

Verified Customer of One Source Plumbing and Rooter, Inc., 42 of 108

10 Quality
Yes Loyalty
Marjorie W.

They are efficient, friendly and professional.

Their timeliness, they were on time and they finished in a timely manner. They did more than expected.

Verified Customer of One Source Plumbing and Rooter, Inc., 43 of 108

10 Quality
Yes Loyalty
Camilo W.

They were reliable, helpful and communicative.

I only used them once and they explained my issues well. We discussed the issue and we came up with a contingency plan. Everything went well.

Verified Customer of One Source Plumbing and Rooter, Inc., 44 of 108

10 Quality
Yes Loyalty
Bobby M.

They're reliable, quick, and affordable.

I liked their flexibility and their friendliness.

Verified Customer of One Source Plumbing and Rooter, Inc., 45 of 108

10 Quality
Yes Loyalty
Amit S.

They're fast and professional.

They were able to solve the problem in a friendly manner.

Verified Customer of One Source Plumbing and Rooter, Inc., 46 of 108

10 Quality
Yes Loyalty
Jim C.

They were on time and honest.

Basically, they were just on time, they did what they needed to do, and they were honest.

Verified Customer of One Source Plumbing and Rooter, Inc., 47 of 108

10 Quality
Yes Loyalty
Brian M.

Don't work with anyone else.

He is trustworthy, honest and fast.

Verified Customer of One Source Plumbing and Rooter, Inc., 48 of 108

10 Quality
Yes Loyalty
M.L.G.

They were reliable and good.

They were efficient.

Verified Customer of One Source Plumbing and Rooter, Inc., 49 of 108

10 Quality
Yes Loyalty
Stephen R.

I would recommend them.

They were punctual and easy to communicate with.

Verified Customer of One Source Plumbing and Rooter, Inc., 50 of 108

10 Quality
Yes Loyalty