San Rafael Commercial Plumbing
Serving Marin & Sonoma County Businesses Since 1961
Commercial plumbing problems don’t wait for a convenient time. In Marin County, buildings span decades of construction eras, pipe materials vary widely, and the region’s hillside terrain can cause settling that stresses plumbing systems over time. When something goes wrong, you need a contractor who knows what they’re looking at.
Marin H2O has been handling commercial plumbing repairs in San Rafael since 1961. We’re family-owned, fully licensed and insured, and backed by a professional network that includes general contractors and HVAC technicians. This means we can take on large-scale or complex jobs.
Call (415) 877-9745 or contact us online for a free estimate on your commercial plumbing project. Same-day and emergency appointments are available as often as possible.
Common Commercial Plumbing Issues
Commercial properties see the same core plumbing failures as residential, just more often. Common reasons our commercial clients call us:
- Toilet clogs and sink clogs
- Clogged floor drains or shower drains
- Low water pressure
- Water heater failures
- Leaks at faucets or fixtures
- Leaky valves and shutoffs
- Dripping faucets
Commercial Fixture Replacement
Fixture issues identified during a repair visit don’t have to wait. We replace:
- Toilets
- Faucets
- Water shutoffs
- Sink drains
- Shower drains
- Spigots
- Flexible plumbing hoses
Full-Scope Commercial Plumbing Services in San Rafael
Beyond repairs and fixture replacements, we offer a complete range of commercial plumbing services for new construction, tenant improvements, and renovations. Whether you’re outfitting a new commercial space or updating an aging system, we handle the full scope of work.
Commercial Water Heater Installation & Replacement
We install and replace commercial water heaters for businesses of all sizes, from small offices to high-demand facilities.
Commercial Repiping
Many older buildings in Marin County have original pipe materials that have reached the end of their useful life. We assess and repipe commercial properties to help restore water flow and pressure.
Backflow Prevention
Backflow prevention devices are required by code for many commercial properties and must be tested and certified annually. We install, test, and service backflow prevention assemblies to help keep your property in compliance.
Drain Cleaning & Grease Trap Service
High-volume drain cleaning and grease trap service are routine needs for restaurant and food-service properties. We clear commercial-grade blockages and keep drainage systems running.
Underground Utility Installation
We perform our own excavation work to install and service underground utilities. This is a capability many commercial plumbing contractors don’t have in-house. Combined with our cross-trade network, we can manage large-scale commercial jobs.
All work is performed in-house or by trusted partner companies within our professional network. Large commercial projects often require coordination across multiple trades, and our existing cross-trade relationships make that straightforward. Every job comes with a one-year labor warranty.
Why San Rafael Businesses Choose Marin H2O
For business owners, plumbing downtime affects operations directly. We offer same-day and emergency commercial plumbing appointments as often as possible to help minimize disruption. We’ve been serving commercial clients in San Rafael and throughout Marin and Sonoma Counties since 1961. We’re locally owned, family-operated, and built around values of integrity, accountability, respect, professionalism, transparency, and customer service.
Every commercial plumbing project starts with a free estimate, and we offer financing on select services. Transparent pricing and a one-year labor warranty on all work mean you know what you’re getting before we start.
Contact us online or call (415) 877-9745 to schedule commercial plumbing service in San Rafael or request your free estimate.
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“My contractor and I have worked with Marin H2O for several years, and the service has only gotten better over time. From scheduling to plumbing coordination to maintenance, the entire team is professional, efficient, and a pleasure to work with.”Marion Hill
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“Today I used Marin H2O for the first time on the recommendation of my neighbor. The plumber they sent, Franklin, was on time, professional, respectful, courteous, and did an excellent job flushing my tankless hot water heater.”Dominic D.
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“We used Marin H2O for two toilets and their installation. Franklin was sent, and we found him to be a very experienced plumber. He's reliable, engaging, quick, complete, and willing to explain details of what he was doing.”Nadine S.
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“Marin H2O is highly responsive. Our job was scheduled immediately. The staff showed up promptly, completed the installation quickly and neatly. We just got the bill, and it was a fraction of the price from another plumbing company.”Becket C.
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“Reliable, honest, and efficient! A sewer lateral leak on a shared driveway is no fun - and after interviewing multiple vendors, it was abundantly clear that Marin H2O is the way to go. Very knowledgeable and educates their customers.”Iris K.
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“It's a real pleasure to work with a group of people who are highly professional, know what they are doing, and are trustworthy and dependable. I couldn't have asked for a better outcome and experience.”Benhur M.
The Marin H2O Difference
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Local, Trusted & LicensedProudly serving our community with fully licensed, dependable experts you can trust.
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Offering 100% Free QuotesTransparent, no-obligation quotes to help you make informed decisions—always free.
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Top-Notch Customer ServiceWe prioritize your satisfaction with friendly, professional support every step of the way.
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Backed By a WarrantyQuality work guaranteed with reliable warranties for your peace of mind.
