Dedicated reverse osmosis drinking water faucet in a kitchen, installed by Hydrology

Manatee · Sarasota · Hillsborough · Pinellas · Charlotte

Tankless Reverse Osmosis Drinking Water

4.7★ from 212 Google reviews  ·  WQA Gold Seal Puronics dealer  ·  Our own techs, no subcontractors

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Tankless RO in Sarasota

Tankless reverse osmosis
for Sarasota kitchens.

We install tankless RO under kitchen sinks across Sarasota, Venice and Lakewood Ranch. A tankless unit makes water on demand, so there is no storage tank taking up the cabinet, which matters in condos and smaller kitchens. See water treatment for condos and villas.

City of Sarasota water
Already RO-treated and softened at the plant, and disinfected with chlorine. A tankless RO at the sink is about taste and getting the most out of your drinking water.
Sarasota County water
Most homes outside the city are on chloramine. The carbon stages in a tankless RO reduce chloramine taste before the membrane.
Not sure which you have
Your water bill says which utility you are on. Or book the free in-home water test and we will tell you, and test your tap while we are there.

Water treatment in Sarasota · Drinking water systems in Sarasota · Venice

Certified for PFOA/PFOS · NSF/ANSI 53Lead · arsenic · fluoride · TDS · NSF/ANSI 58WQA Gold SealPuronics · Franklin ElectricOur own techsCertified for PFOA/PFOS · NSF/ANSI 53Lead · arsenic · fluoride · TDS · NSF/ANSI 58WQA Gold SealPuronics · Franklin ElectricOur own techs
Drinking water · Tankless RO

Tankless Reverse Osmosis

All the bottled-water taste of reverse osmosis without the bulky storage tank — a compact, high-flow tankless RO that frees up the cabinet under your sink and delivers fresh water on demand.

AQUA FLO tankless reverse osmosis system installed under a kitchen sink

Bottled-water taste — without the bulky tank

A tankless reverse-osmosis system gives you the same clean, great-tasting RO water as a traditional under-sink unit, but without the big storage tank eating half your cabinet. We install the AQUA FLO tankless RO — a slim, modern unit with a matching designer faucet. If you’ve seen WaterDrop online, this is our take on that idea, except we install it and service it locally, so you’re never chasing a filter online or waiting on a call center.

Takes up far less space

No bulky pressure tank under the sink. The whole system is one slim unit, so you get your cabinet back.

More water, on demand

A built-in pump pushes water through the membrane on demand, so you get strong flow and more RO water at once — no waiting for a small tank to refill.

Quick, easy filter changes

Filters twist in and out in seconds — no wrenches, no mess. Change them yourself in a minute, or we handle it on a service visit.

Optional alkaline remineralization

RO water comes out slightly acidic — carbon dioxide slips through the membrane and there is no alkalinity left to buffer it. An alkaline stage corrects that: a carbon/calcite cartridge polishes the water through coconut-shell carbon, then passes it over calcite, which dissolves just enough to put calcium back and bring the pH up. We test it at installation and again on service calls and it reads above 9. What you notice is the taste: smoother, slightly sweeter. It is a taste upgrade, not a health one — your minerals come from food, not your tap. The cartridge is a consumable — the calcite dissolves as it does its job, so it gets changed every three to six months depending on your water and how much you drink. We check the pH at every service visit. One cartridge we pulled after a full year, well past its interval, still read 8.5. Mention it and we’ll add it. It’s the upgrade more of our clients are asking for.

Not sure if tankless is right for you? We test your water free and walk you through the trade-offs between a tankless RO and a traditional tank system — no pressure, just the answer for your home.

No bulky storage tankFaster flowMore cabinet spaceGreat-tasting drinking water
  • Reverse-osmosis purity — removes dissolved solids for crisp, clean drinking water
  • Tankless design frees up the whole cabinet under your sink
  • High-flow membrane delivers water faster than older tank systems
  • Fewer stages to change and a lower drain ratio than traditional RO
  • Perfect where space is tight — condos, smaller kitchens, RO at a second sink
AQUA FLO tankless reverse osmosis system installed by Hydrology under a kitchen sink in the Bradenton-Lakewood Ranch area
Drinking Water Solution
Tankless RO

Reverse osmosis is the gold standard for drinking water — it pushes water through a semipermeable membrane that removes the dissolved solids, taste and contaminants a carbon filter alone leaves behind. The one drawback of traditional RO is the bulky pressurized storage tank that eats up your under-sink cabinet. A tankless system solves that.

Instead of storing water in a tank, a tankless RO uses a higher-capacity membrane and an internal pump to produce water on demand, right when you open the faucet. That means a slim footprint that frees your cabinet, a faster flow than old tank systems, and fresher water because it isn’t sitting in storage. Most tankless units also waste less water to drain and use fewer, longer-lasting filter stages — so they’re simpler to own.

Tankless RO is ideal for condos, smaller kitchens, and anywhere counter and cabinet space is at a premium — exactly the situations we see all over the Suncoast. Pair it with a whole-home softener and the membrane lasts even longer, because it isn’t fighting hardness. We’ll show you both the classic and tankless options and match the system to your kitchen and your water. It’s also our pick when a household drinks a lot of water or wants RO at the refrigerator: the built-in pump keeps pressure steady, while a tank system’s pressure drops as the tank empties and the fridge dispenser slows down. It needs an outlet under the sink.

Common questions

→ See all frequently asked questions

Protect your membraneSoft water upstream keeps scale off the RO membrane so it lasts longer and tastes better. Many homeowners add a whole-home softener with their RO.
See whole-home softening
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What your neighbors say

4.7★ from 212 Google reviews.

★★★★★
“I cannot say enough amazing things about this company and system! We had three companies come out and Hydrology stood out on every level.”
— Denise W. · Google review
★★★★★
“We’ve had our system now a month and absolutely love it. My wife is a hair beautician with over 30 years of experience and definitely can tell the difference with the water.”
— Charles P. · Google review
★★★★★
“Wow, I can definitely feel a difference in my hair, skin, and when I wash my hands. I knew getting a water softener was a priority and I’m so glad I decided to go with Hydrology.”
— Renee C. · Google review

Every review is on our Google profile — read all of them there. We don’t cherry-pick; we just answer the phone.

Straight answers

Common questions.

What people ask before they book.

More water answers →
What hard water does to a home: the Battelle study →

What’s the difference between tankless and regular RO?

Water quality is the same — both use a reverse-osmosis membrane. The difference is storage: a tankless system makes water on demand instead of holding it in a pressurized tank, so it frees up your cabinet, flows faster, and gives you fresher water that hasn’t been sitting in storage.

Does tankless RO flow fast enough?

Yes — tankless units use a higher-capacity membrane and a booster pump to keep up with normal kitchen use, filling glasses and pots noticeably faster than older tank-based systems. For very high-volume needs we’ll size accordingly.

Does it waste a lot of water?

Modern tankless RO systems are efficient and typically send less water to drain than traditional RO. We’ll go over the exact ratio for the model we recommend so there are no surprises.

Will it fit under my sink?

That’s the whole point — without a storage tank, a tankless RO has a slim footprint and leaves most of your cabinet free. It’s the go-to choice for condos and smaller kitchens where space is tight.

Do I still need a softener with it?

Not required, but recommended on hard water. Softening the water before it reaches the RO protects the membrane from scale so it lasts longer and performs better — the two systems complement each other.

Keep reading

Related pages.

Manufacturer literature

The full Aqua Flo brochure for this tankless system — features, specifications and connections, unedited.

Download the PDF →Every brochure we have: Product Brochures
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“Wow I can definitely feel a difference in my hair, skin, and when I wash my hands. I knew getting a water softener was a priority and I’m so glad I decided to go with Hydrology. I’m thoroughly impressed with the company and the product!”

- Renee C.

“I cannot say enough amazing things about this company and system! We had three companies come out and Hydrology stood out on every level. This company is very professional, answered every question we had and even gave us time to think without “pressuring” us to buy! Our water is fabulous the taste and feeling it leaves on skin I am wondering how I have went so long without this system! ”

- Denise W.

“We’ve had our system now a month and absolutely love it and we can see and feel the difference immediately. My wife is a hair beautician with over 30 years of experience and definitely can tell the difference with the water which is important for hair and skin. Highly recommend this company and look forward to many years of clean, soft and healthy water!”

- Charles P.
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★★★★★ 4.7 · Manatee · Sarasota · Pinellas · Hillsborough · Charlotte