Licensed & Insured · CA LIC #982663
Open 24/7 · Mon-Sun
Pacifica, San Francisco, Burlingame, CA · Serving the Bay
PACIFICA, CA • LIC #982663 • 24/7
We answer the phone day, night, weekends, and holidays average response under 60 minutes.
Reverse osmosis is the most thorough filtration you can put on a drinking water tap. We install and service under-sink RO systems across Pacifica, San Francisco, and Burlingame, plumb them properly to the faucet and the fridge, and set you up on a filter schedule you can actually keep.
Upfront pricing. Same-day service. No obligation.
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THIS MONTH’S BEST DEAL
One-time use. Combine with our 24/7 emergency service and pay only when the job is done. Mention this offer when you book.
Expires soon · Cannot be combined
An RO system pushes water through a semi-permeable membrane that rejects dissolved solids down to a very small size, which is why it removes things that carbon filters alone do not: nitrates, fluoride, sodium, lead, and a broad range of dissolved contaminants. It sits under the sink, feeds a dedicated faucet, and usually a fridge and ice maker line as well.
Two things are worth understanding before you buy one. First, RO is point-of-use rather than whole-house, because producing that quality of water for showers and laundry would be wasteful and unnecessary. Second, it produces some waste water in the process, typically a few gallons rejected per gallon produced depending on the system, which is a real if modest tradeoff.
The other honest point is that RO strips minerals along with contaminants, so some people prefer a remineralisation stage for taste. We will talk through whether RO is what you actually need or whether a simpler carbon system would give you the result you are after for less. Book a free estimate any time, no obligation.
Great professional and quick service! Shamir was friendly, efficient, and professional. He fixed the leaking problem in my sink and garbage disposal in under an hour. Highly recommend!
George G., Daly City, Yelp review
Every RO installation comes with upfront pricing, licensed and background-checked technicians, and a 100% satisfaction guarantee. Works Plumbing holds California contractor license #982663, carries full bonding and insurance, and holds an A+ rating with the Better Business Bureau.
We are a plumbing-only shop, which means the tech at your door has spent years on this exact work rather than splitting time across three trades. Our crews are drug tested as well as background checked, and dispatch is staffed by real people around the clock. No surprises, no commission-driven upsells, no pressure, ever.
Write your filter change dates on the housings with a marker when they are installed. Pre-filters typically need replacing every six to twelve months and the membrane every two to three years, and a neglected pre-filter destroys the membrane, which is the expensive part. Thirty seconds with a marker protects the most costly component in the system.
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A very broad range of dissolved contaminants, which is what separates it from carbon filtration. The membrane rejects dissolved solids including lead, nitrates, fluoride, sodium, sulphates, and many dissolved metals, alongside the chlorine taste and sediment that a carbon stage handles. If your concern is taste and chlorine alone, a simpler carbon filter may be all you need, and we will say so rather than selling you more system than the water requires.
Pre-filters every six to twelve months depending on sediment and chlorine levels, and the RO membrane every two to three years. The order matters: the pre-filters exist to protect the membrane, so skipping them shortens the life of the most expensive component significantly. We set you up with the schedule and the correct cartridge numbers at install, and we can service it on a recurring visit if you would rather not track it.
It produces some waste, and it is fair to know that before buying. Older systems rejected around four gallons per gallon produced. Modern systems are considerably better, and permeate pump models better still. In household terms the volume is modest against showers and laundry, but if water use is a primary concern, that is worth weighing, and we can point you at the more efficient configurations.
Often the two do different jobs and complement each other rather than overlap. A whole-house system protects your plumbing and appliances and improves water at every tap, typically handling sediment, chlorine, and hardness. RO targets dissolved contaminants at the one tap you drink from, to a standard no whole-house system economically achieves. If you have one and are considering the other, we will test the water and tell you whether it adds anything real.
Yes, and there is no obligation attached to it. We come out, diagnose the actual fault, and give you one flat price covering parts and labor before any work starts. If you decide not to book, you owe nothing and we will not chase you with follow-up calls. We would rather you had an honest number to compare than feel cornered into a decision at the door.
Yes. Works Plumbing holds California contractor license #982663, carries full bonding and liability insurance, and is accredited with an A+ rating from the Better Business Bureau. Every technician who comes to your door is background checked and drug tested, and arrives in a marked Works van in uniform. If you want to verify the license before booking, you can look it up on the California Contractors State License Board website.
Three Peninsula locations put a stocked truck near you, from San Francisco down to Atherton, covering 22+ cities every day.
Combined across our Pacifica, San Francisco, and Burlingame locations.
“I had a backed up kitchen drain and David from Works Plumbing came out and cleared the line in a matter of minutes. Very professional and very knowledgeable. Definitely recommend!”
“Great professional and quick service! Shamir was friendly, efficient, and professional. He fixed the leaking problem in my sink and garbage disposal in under an hour. Highly recommend!”
“Thank you again for another job well done, and thank you for responding right away. I will continue to recommend Works Plumbing because they respond right away and get the job done efficiently.”
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Drain cleared or it’s free. Limit one per household.
Mention this offer when you schedule EXPIRES 12/31/2026Save $500 on a new tankless water heater install.
Mention this offer when you schedule Expires 12/31/2026With any drain cleaning service over $250. See the problem yourself.
Mention this offer when you schedule Expires 12/31/2026Thank you for your service. Ongoing: no expiration.
Mention this offer when you schedule Valid year-roundLabor only with purchase of new toilet. Includes haul-away.
Mention this offer when you schedule Expires 12/31/2026Honest pricing, no obligation. We won’t waste your time.
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A real human will answer, dispatch a stocked Works van, and get someone at your door, usually in under an hour. No phone trees. No robots. No “we’ll get back to you Monday.”
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