Licensed, bonded, and insured since 2004
San Francisco's Radiant Heating & Boiler Experts
Hydroflow Plumbing Inc. tackles the complex jobs that others shy away from: hydronic radiant heating, boiler installation, water heaters, and leak detection, for Bay Area homes from Victorian flats to Eichler houses.
- 20+
- Years serving the Bay Area
- 2
- Counties served: SF & Marin
- 16
- Manufacturer brands we install
- 100%
- Licensed, bonded & insured
What we do
Explore Our Heating & Plumbing Services
Radiant Heating Design & Installation
We design and install hydronic radiant heating systems for new construction, remodels, ADUs, and Eichler homes throughout San Francisco and Marin County. Twenty plus years of experience and a track record that spans from Victorians to mid century modern, covering underfloor tubing embedded in concrete, staple up systems in the joist cavity for finished spaces, and above floor panels and wall radiators, plus in house boiler selection and sizing for every project.
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Boiler Installation, Repair & Maintenance
Boilers are more advanced than a standard water heater. They adjust their power output to match your exact heating needs, running 95 to 97 percent efficient against 50 to 60 percent for older models, and modulate from 10 to 100 percent based on demand. We handle new installation with proper sizing and code compliance, emergency repair with error code diagnosis, and annual maintenance including tune ups, flushing, and safety inspections, for combi boilers, system boilers with indirect tanks, heating only boilers, and Eichler home systems.
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Water Heater Installation & Repair
Storage tank, tankless, or heat pump, we help you choose the right system, size it correctly, and install it to code. We offer same day replacement on like for like swaps and handle all permits and inspections. Storage tank units run 80 to 85 percent efficient with 40 to 50 gallon capacity, tankless units reach 95 percent efficiency in a wall mounted, space saving footprint, and heat pump units run 300 to 400 percent efficient against standard electric. We size every system to your actual usage, not just what you already have.
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Leak Detection Device Installation
Many insurers, including State Farm, now require smart water shutoff devices to maintain coverage in California. We install whole house leak detection systems that run continuously and shut off water automatically the moment a leak is detected, from burst pipes and slow leaks to a running toilet, with no human action required. Installation takes half a day to a full day and includes the device, main line installation, power hookup, WiFi configuration, system testing, and a full walkthrough, with remote monitoring from anywhere.
Learn moreEichler Plumbing & Radiant Heating Specialists
We have more experience with Eichler homes than almost any contractor in the Bay Area, twenty plus years caring for the original in slab radiant systems across Marin and San Francisco. Cold spots on the floor, sludge buildup, and aging boilers are common in these sixty plus year old systems. Our four step restoration, pressure testing the floor loops, flushing out magnetite sludge, installing magnetic filtration, and upgrading to a high efficiency modulating condensing boiler, can cut heating bills by 30 to 40 percent, and a space saving combi option adds hot water without adding equipment.
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Multifamily & HOA Plumbing Specialists
We keep the hot water running for San Francisco's apartment buildings and HOAs, with fast response, commercial expertise, and seamless coordination with property managers. We respect your tenants, posting advance notices and keeping clean jobsites, and back it with same day diagnosis on building down calls, a direct line to our commercial team, and 24/7 emergency availability. Our work covers Title 24 energy compliance, annual boiler safety inspections, seismic shutoff valve installation, redundant cascaded commercial boiler systems, and tankless rack systems with no recovery wait.
Learn moreWhat we hold to
Why choose Hydroflow Plumbing Inc.?
Twenty plus years of deep expertise in Bay Area homes, with proper licensing, liability coverage, and manufacturer authorization on every job. Verified before we leave, every time.
Preventive Care
We check water pressure and identify potential issues before they become costly problems.
20+ Years Local
Deep expertise in Bay Area homes, from Victorian flats to Eichler houses, since 2004.
Transparent Pricing
Upfront estimates with clear explanations. No hidden fees or surprises.
Right-Sized Solutions
We recommend systems that match your actual needs, not just what you already have.
Factory-Authorized
Authorized installer for Navien, Lochinvar, and Triangle Tube, with manufacturer specific training.
Licensed, Bonded & Insured
CSLB #1004731, with full liability and workers compensation coverage on every job.
How we work
Free estimates, straight advice, and no pressure.
We tackle the complex jobs that others shy away from, from a sixty year old Eichler radiant slab to a full commercial boiler replacement, verified before we leave, every time.
- Proper licensing, liability coverage, and manufacturer authorization on every job
- Factory authorized for Navien, Lochinvar, and Triangle Tube
- Free, no obligation estimates for most projects
Factory authorized
Trusted Brands We Install
Where we work
Proudly Serving San Francisco & Marin County
From the Sunset and the Richmond to Novato and Lucas Valley, our trucks are on the road every day.
Good to know
Frequently Asked Questions
- What areas do you serve?
- We proudly serve San Francisco and Marin County, including Novato and San Rafael.
- What water pressure is too high for my home?
- Anything over 80 PSI can damage your fixtures and cause leaks. We check pressure on every visit and can install a regulator if needed.
- Do Eichler homes still have their original radiant heating?
- Eichler homes in Marin, like Lucas Valley, and in San Francisco often still have their original 60 year old radiant heating systems. We specialize in restoring and upgrading them.
- Do you offer free estimates?
- Yes, we provide free, no obligation estimates for most projects.
- What is the difference between a boiler and a water heater?
- A standard water heater just heats water for showers. A boiler is a more powerful system that can do that plus heat your home.
- Why do I need a leak detection device?
- Many insurers, including State Farm, now require a smart water shutoff device to maintain coverage in California, and it protects your home from costly water damage.
Prefer to call?
(415) 623-6564. Free estimates and straight advice.
Let's talk about your project!
Whether it's a new boiler, a radiant heating restoration, or a leak detection install, our team is ready to help.
Licensed, bonded, and insured. CSLB #1004731. Serving San Francisco and Marin County.