4-stage reverse osmosis
Maximum purity at the kitchen tap.
- Four stages: sediment, carbon, membrane, polish
- 50 or 75 gallons per day, chrome or brushed nickel
- Its own dedicated faucet at the sink
From $1,205 installed
Reverse osmosis drinking water bottled quality from your own tap
Bottled water gets expensive and fridge filters only do so much. An under-sink reverse osmosis system removes what carbon alone can't, from its own dedicated faucet. We install it clean, quote it upfront and maintain it for years.
- 4.9 from 114 Google reviews
- Make‑It‑Right Guarantee
- Free estimates
- CA C-36 #890196
Sound familiar?
Pick the closest match. Each one is a reason Sonoma County homeowners call us about RO.
Tired of buying bottled water
Cases of plastic bottles add up fast. RO gives you better water on tap for a fraction of the cost.
See your optionsYour fridge filter isn't enough
Pitcher and fridge filters only catch so much. RO's membrane removes what they can't.
Compare RO and Hydro PointTap water tastes off
Even good Sonoma County water isn't what most families want in their glass. RO fixes the taste for good.
Schedule a water testCoffee and cooking deserve better
Clean water makes better coffee, ice and cooking. RO delivers it right at the kitchen sink.
See your options
Already have RO, but it runs slow or never shuts off? We repair all brands and replace cartridges and membranes. Schedule service.
Reviews
Water quality work, in our neighbors' words
“… Abel showed me how to properly secure them and explained what to look for in the future. He was professional, patient, and honest, and he fixed the problem quickly without trying to sell me services I didn't need. …”
“Amazing people! They really saved my butt on this one. They were able to quickly come out and line a pipe. Very professional. Did an amazing job. Gina and Dominic are fantastic. Cannot recommend them enough.”
“I wish I could give this company 10 stars! This was my second time using Simeone and they are consistently professional and courteous from start to finish. …”
Drinking water options
Three ways to better drinking water, and we'll help you pick
Every home's water is different. Your tech walks you through the real options for your water after a test, not a sales pitch.
Financing available. Qualifying projects can be financed through Synchrony. Ask about it when you request an estimate.
Installed by plumbers
An RO is only as good as its install
Simeone Plumbing, Inc. has installed under-sink drinking water systems across Sonoma County since 2007. We drill granite, quartz and stainless cleanly, set the faucet you chose, and connect everything to code.
- Clean drilling in granite, quartz or stainless, or we use an existing sprayer or soap hole
- An optional line to your fridge or ice maker
- Cartridges about once a year, the membrane every two to three years
The details, if you're comparing
Reverse osmosis or Hydro Point: the honest breakdown
Same facts, side by side. Find the column that sounds like your house.
Reverse osmosis
Best for maximum purity.
A membrane removes dissolved solids carbon can't catch. The most thorough drinking-water fix.
- Removes more: lead, cysts, dissolved solids, chlorine taste
- Output: 50 or 75 gallons per day
- Its own faucet: plus an optional fridge or ice line
- Easy upkeep: cartridge and membrane swaps on schedule
RO sends some water to drain while filtering. Modern 4-stage systems keep it to a minimum.
Halo Hydro Point
Best for good city water and simpler needs.
A compact 2-stage under-counter filter. Better water without a full RO system.
- Compact: fits tight under-sink spaces
- No tank: nothing bulky to fit
- No drain water: filters without waste
- Lower cost: less than a full RO
It won't match RO's purity on tough water, but for many Sonoma County homes it's all you need. We'll tell you honestly.
Want it at every tap? Whole-house carbon systems (Halo 5, H2 Zero, Big Blue) clean up chlorine taste and odor house-wide, and pair well with RO for the complete setup. See Halo whole-house systems.
Everything we do
RO and drinking water, end to end
Systems we install
We install under-sink reverse osmosis and drinking-water filters, sized to your household and installed clean, with the faucet finish that matches your kitchen. Every install is done to code with a fixed price approved by you first.
- 4-stage RO, 50 GPD chrome
- 4-stage RO, 50 GPD brushed nickel
- 4-stage RO, 75 GPD high-output
- Halo Hydro Point (2-stage)
- Designer RO faucet upgrade
- Fridge and ice-maker line
- Customer-supplied RO install
- RO drain and sink drilling
- Granite and quartz faucet drilling
- Whole-house plus RO pairing
Service and maintenance
We keep your RO performing: membranes and cartridge sets on schedule, plus repairs for slow flow, drain issues or a constantly running system.
- RO cartridge set, GRO-2550
- RO cartridge set, GRO-475
- RO membrane replacement
- Hydro Point cartridge swap
- Slow-flow diagnosis
- RO drain repair
- Faucet replacement or upgrade
- Annual filter change
- System repair (all brands)
- Water testing and re-test
How it works
From first test to clean water, without the runaround
A free water test
We test your water on-site at no charge with your service call: hardness, chlorine, what's actually in it. You get a real arrival window and a text with your tech's name and photo.
The right system, not the priciest
We recommend what your water actually needs, with a fixed price before any work begins.
A clean install
To code, with proper bypass and connections, and the work area left cleaner than we found it.
Backed by our guarantee
Your new RO system carries the manufacturer's warranty for that unit, plus our Make‑It‑Right Guarantee on workmanship.
Why Simeone for your RO
Honest advice, clean installs, years of service
Sometimes a simpler 2-stage filter is all you need, and we'll say so. When RO is the right call, we install it to code and keep it running with scheduled cartridge and membrane changes.
- Honest advice: sometimes a simpler 2-stage filter is all you need
- A fixed price you approve before any work begins
- Code-compliant installation, proper bypass and drain
- Annual maintenance plans so it keeps performing
- Licensed: CA C-36 #890196
Ways to save on drinking water systems
Mention the code when you call, or add it to the notes when you book online.
Seniors 65 and older
10% off
Senior discount up to $250, any service.
For neighbors 65 and older. Mention the code when you book.
Residential only. One per household. Specials cannot be combined with each other or with any other discount.
Reverse osmosis questions, answered straight
What does reverse osmosis remove?
The membrane catches dissolved solids that carbon can't: lead, cysts, chlorine taste and odor, and more, depending on staging. We'll show you the spec sheet for the exact system we recommend.
How much does reverse osmosis cost installed?
4-stage Pentair reverse osmosis is installed starting at $1,205, with ten designer faucet finishes available. Halo Hydro Point is quoted at a flat rate at your free consultation. Either way, you approve a fixed price before any work begins.
Does RO waste water?
Some water goes to drain while the membrane filters. Modern 4-stage systems are far more efficient than older units, and a clean install keeps it to a minimum.
How often do filters and the membrane need changing?
Cartridges roughly once a year, and the membrane every two to three years. A maintenance plan keeps it automatic so flow and taste stay strong.
Can you install RO in my existing sink?
Almost always. We drill granite, quartz or stainless cleanly, or use an existing sprayer or soap hole. That's plumber work, and it's what we do.
Can RO feed my fridge or ice maker?
Yes. We can run an optional line from your RO system to your fridge or ice maker when we install it.
Do you service RO systems you didn't install?
Yes. We repair all brands, including slow flow, drain issues and systems that run constantly, and we replace cartridges and membranes. See our water filtration overview for everything we maintain.
Want better drinking water? Let's test yours.
Free water test with any service call, across Sonoma County. Book online in about a minute, or call us.