Membrane-grade drinking water
A thin-film composite RO membrane with salt rejection of at least 93.6% reduces PFAS, lead and other dissolved solids that ordinary carbon cartridges do not.

Aqua Flo CRO-800UX6 · Installed in Mobile + Baldwin County
An 800 GPD tankless RO under the kitchen sink — PFAS, lead and dissolved solids out of your drinking water, with no storage tank.
$1,895 installed
Reverse osmosis is the drinking-water answer when a cartridge filter is not enough. Water is pushed through a membrane fine enough to reject dissolved contaminants that pitcher and fridge filters pass straight through, and it comes out of a dedicated faucet at your kitchen sink.
This one is tankless. Older RO systems store finished water in a pressure tank that takes up half the cabinet; this unit makes water on demand, so the space under the sink stays usable. It is the Aqua Flo CRO-800UX6, built by Hydrotech, with an 800 gallon-per-day membrane.
$1,895 installed. A free in-home water test comes first, so you know whether your water needs a membrane before you buy one.
A thin-film composite RO membrane with salt rejection of at least 93.6% reduces PFAS, lead and other dissolved solids that ordinary carbon cartridges do not.
An 800 GPD membrane delivers up to 0.62 gallons per minute to the faucet, with no storage tank taking up the cabinet.
It runs at about 2 gallons of purified water for every 1 gallon sent to drain, with 65% recovery.
A built-in leak detector shuts the unit off and sounds an alarm, and a filter-life indicator tells you when one of the two quick-change cartridges is due.
| Brand / model | Aqua Flo CRO-800UX6 (Hydrotech) |
|---|---|
| Membrane rating | 800 GPD, thin-film composite |
| Flow rate | 0.62 gal/min (2.3 L/min) |
| Salt rejection | ≥ 93.6% |
| Recovery / drain ratio | 65% · 2 purified : 1 drain |
| Cartridges | Two quick-change: 3-in-1 prefilter and RO membrane |
| Feed pressure | 30 – 70 psi |
| Feed water temperature | 4 – 38 °C (39 – 100 °F) |
| Power | 100–240 V AC in, 24 V DC out, 120 W |
| Connections | 3/8" inlet and faucet, 1/4" drain (quick-connect) |
| Unit dimensions | 5.1 × 15.6 × 14.8 in |
| Safety | Leak detector with automatic shut-off and audible alarm |
Specifications are Hydrotech's published figures for the CRO-800UX6.
$1,895 installed. The free in-home water test comes first.
A reverse osmosis membrane is fine enough to reduce PFAS (forever chemicals) and lead along with other dissolved solids. That is the main reason to choose RO over a carbon cartridge.
No storage tank means the cabinet stays usable and water is made fresh on demand. This unit is rated at 800 gallons per day and delivers up to 0.62 gallons per minute.
About 1 gallon to drain for every 2 gallons of purified water, per Hydrotech's rating.
Every install carries our 1-year parts and labor warranty, and adding the $34.95/month maintenance plan extends it to a lifetime labor warranty.
Not as a cart checkout. We install every system after a free water test, so ordering starts with a call to (251) 292-3888 or the quote form on this page.
Service
A point-of-use system at the kitchen sink that strips dissolved solids, PFAS, lead, and chlorine.
Product · $4,995
Catalytic carbon plus an ion-exchange softener at the main line — chlorine, chloramine and hardness handled for every tap in the house.
Start here
Hardness, chlorine, TDS and a soap test at your tap, before you buy anything.
From the blog
Aug 19, 2026 · 5 min read
Often yes. The questions worth settling first are sizing, warranty and who owns the outcome if the unit turns out to be wrong for your water.
Aug 19, 2026 · 6 min read
Two proposed rules, and only one is a rescission. The limits for PFOA and PFOS are not being withdrawn — the compliance deadline is what may move.
Aug 19, 2026 · 5 min read
Older units send several gallons to the drain for every gallon produced. The ratio varies enormously by design, and one variable dominates it.
Tell us your ZIP and what you’re solving for. We’ll follow up within the hour during business hours to schedule a free in-home water test.