Marin H2O
Company Overview
Water Treatment Solutions
Proudly serving the community since 1961.
Rick, the third generation of our family, manages the company.
Rick created Marin H2O and merged it with Marin Refined Water Systems to expand our service offerings.
This merger allows us to provide a wider array of services.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
- Water purification system cleaning and maintenance
- Water purification system installation
- Water purification system repair
- Salt delivery
Business Location & Hours
Mon: | Open 24 hours |
Tue: | Open 24 hours |
Wed: | Open 24 hours |
Thu: | Open 24 hours |
Fri: | Open 24 hours |
Sat: | Open 24 hours |
Sun: | Open 24 hours |
Recommended Customer Reviews

We had a major water/sewage in house crisis. I called Marin H20, which is my preferred plumbing business. I called on a Sunday, expecting to get a message machine. Rick (owner) actually answered the phone! He tried to schedule us for that day but unfortunately all his crew were out helping with other problems. That's ok, we managed fine. The next day Ken came out, listened to my description of the problem, looked at certain pipes and vents (I don't have plumbing vocabulary yet) and knew exactly what to do to fix the problem. Out came the huge ""snake machine"" and invasive roots were cleared from the pipes. It took longer to unload and load the equipment than it did to fix the problem! Amazing. He asked me to run the water for everything affected (2 toilets, 2 showers, 2 sinks which days before I had spent 4 hrs decontaminating with bleach, using the plunger to help get ""the stuff"" through the pipes. It was worse than you might imagine!) EVERYTHING WAS WORKING BEAUTIFULLY! He really knows what he is doing. He worked fast, efficiently, did a fabulous job. In fact, anyone who has been here to help us with water/plumbing problems from Marin H20 has been fabulous. Thank you so much! We are grateful for your help! Folks, call Marin H20 first if you need help with a plumbing problem.

I needed our kitchen sink cleared. Marin H2O arrived before the day was over, cleared 35' of our line and advised us on how to help keep the lube clear. Well done!

I could not be happier with Marin H2O. They showed up when they said they would and really put the time in to repair my broken toilet. It had not been working satisfactorily for years. I had called previously another company who had first done half the job and then were unable to make the time to come back. This was not the case with H2O. They showed up and made this commode work better than it had for the last 23 years that I have rented this space.
They then went to my parents house, repaired a fairly complicated sink issue and fixed another issue that wasn't even on their books that a previous plumber had not installed properly. The technician who did this work, Kevin, seems to be a perfectionist, and it shows in his high quality of work.
I don't see myself ever hiring a different company than Marin H2O. Thank you for the great work.

They replaced our sewer lateral 18
Months ago. Very professional and competent (and hard working) team. Also very responsive via email/calls for follow up questions. Def 5 stars. Thank you Ken and team!
Update - 18 months after the sewer work, Ken helped me mark out the sewer and water lines for my retaining wall. Extra effort very much appreciated Ken!

Best plumbing experience ever! The tech was at a nearby job and within 20 minutes after my call the truck was outside. I herded my dogs into a room and the tech said it wasn't necessary - and the dogs really liked him! Points!
The work was basic - the hot water faucet wouldn't turn off so I'd had to turn the water to the house off. He explained why there weren't shut off valves under the sink, explained that the faucet was old but worth saving. And he happened to have the slightly unusual faucet valves in his truck!
After replacing both valve stems, while he was testing the water flow to make sure everything was working, I noticed him wiping the sink clean and leaving it better than he found it. Conscientious and Competent!
I used to be a handyman and I know things can easily get chaotic with plumbing. Marin H2O has my respect, and no doubt if something else comes up they'll be the ones I call. I'm lucky the 3 other plumbing companies I called first were too busy. Marin H2O is in my Address Book now.

Honest, reliable, and competitive.
Only company I trust for underground work and sewer lateral line repairs and replacement.
Ken is the Service Manager and he's great - super knowledgable and willing to answer questions and explain how stuff works.
Lanie (Alana) office manager is the best.
They do pretty much everything from minor repair jobs to big underground project. Been working with them for the better part of a decade.

We received numerous quotes from a variety of plumbers to help my family replace a complicated sewer lateral project.
Ken and his team at Marin H20 were the most responsive and thoughtful to work with than any of the other folks we were in contact with for the sewer replacement. All of the plumbers were respectful while at our property and were quick and efficient in replacing our sewer lateral. We also had Marin H20 replace our water service line since we already had an enormous ditch in the middle of our front yard open. Ken actually pointed out that we had some water leakage, so it was great to see him proactively help us to make sure we didn't have to dig up the front yard again.
All around it was a great process and we are very pleased with the results. When we have future projects around the property we will be calling Ken and Marin H20 for their help. Highly recommend.

Marin H2O did an excellent job replacing our sewer lateral. They had to demolish part of our stamped concrete driveway to get to the line and did a wonderful job replacing the decorative concrete. They were helpful, responsive and prompt.

Hired them to install an under sink water filter. Two leaks and $935 later... the water filter was installed.

We just finished getting Sewer Lateral Replacement by Marin H2O and we couldn't be happier with the company, their people and their service. Kenny and the entire day crew were professional, punctual, personable and polite. They provided invaluable information and advice and helped us fill out the grant program forms. They also handled all the permits and inspections. The crew went out of their way to keep the driveway and sidewalk clean and safe for us and anyone walking by. Best of all they completed the job ahead of time and under budget! A+