Pure water on demand. No tank required.
A 700-gallon-per-day tankless reverse osmosis system that fills your glass straight from the membrane — in a slim cabinet that frees up the space a storage tank used to take.
Traditional under-sink RO systems trickle water into a pressurized storage tank, then push it out at dropping pressure until the tank runs dry. The Aero·RO S9 works differently. A built-in booster pump drives water through a high-flow 700 GPD reverse osmosis membrane the moment you open the faucet, so you get fresh, freshly filtered water at a steady flow of about 0.48 gallons per minute — every glass, every pot, every time, with no tank to refill, sanitize, or replace. Five stages of filtration live in just two twist-off cartridges: a CBPA composite pre-filter and the RO membrane. When one needs changing, it comes out in seconds with no tools and no shut-off valves to chase.
Key Performance Metrics
Five Stages, Two Cartridges
Sediment & Carbon Pre-Treatment
A layered composite cartridge that combines sediment and carbon filtration in a single housing. It captures rust, sand, and silt, and reduces chlorine taste and odor before the water ever reaches the membrane — which also protects the membrane and helps it last longer.
700 GPD Reverse Osmosis
The heart of the system. Pump-driven water is forced through a semi-permeable membrane rated to 0.0001 micron, separating pure water from dissolved minerals and salts. Reduced total dissolved solids (TDS) is what gives RO water its crisp, clean taste.
Carbon Polish & Auto-Flush
A carbon rod built into the RO cartridge polishes the water on its way to the faucet, and the system periodically flushes the membrane surface on its own. Self-cleaning helps clear the concentrated minerals that build up during idle periods, so the first glass tastes as good as the last.
Aero·RO vs. a Conventional Tank RO
| Aero·RO S9 Tankless | Typical 50–75 GPD Tank RO | |
|---|---|---|
| Water supply | Continuous, on demand | Limited to what's in the tank |
| Flow at the faucet | Steady ≈ 0.48 GPM | Slows as tank pressure drops |
| Under-sink space | One slim cabinet | Filter rack plus a 3–4 gallon tank |
| Water freshness | Made fresh as you draw it | Can sit in a tank for hours or days |
| Filter changes | 2 twist-off cartridges | 4–5 housings with wrenches |
| Power required | Yes — built-in booster pump | Usually none |
Designed for Everyday Life
Endless Flow
Fill a pitcher, a pasta pot, or a coffee reservoir without waiting for a tank to recover. The pump makes water as fast as you use it.
TDS Monitoring
Built-in water-quality monitoring tracks total dissolved solids, so you can see the membrane doing its job instead of guessing.
Filter Life Display
The system tracks cartridge life and tells you when a change is due — no calendar reminders, no tasting your way to a spent filter.
Self-Cleaning
Automatic membrane flushing helps prevent scale and mineral build-up and keeps output quality consistent between uses.
Tool-Free Filter Changes
Both cartridges twist out from the front of the unit in seconds. No housings to unscrew, no O-rings to lube, no mess under the sink.
Slim, Clean Design
A compact white cabinet, about 6 inches deep, that sits upright and leaves room under the sink for everything else you store there.
Everything You Need to Install
- Aero·RO S9 tankless RO unit — with built-in booster pump and controls
- CBPA composite pre-filter — installed
- 700 GPD RO membrane filter — installed
- Drinking-water faucet — dedicated counter or sink-deck mount
- Tubing & install kit — feed, drain, and faucet connections
Check under your sink before you order. Because the Aero·RO has an on-board pump, it needs a grounded 110V outlet within reach of the unit — most kitchens already have one for the disposal or dishwasher. You'll also need a cold-water supply line and a drain to tie into.
Full Specifications
| Brand / Model | IPW Industries Aero·RO, Model S9 |
| System Type | Tankless, under-sink reverse osmosis drinking water system |
| Filtration Stages | 5-stage, in 2 cartridges: CBPA composite pre-filter + RO membrane |
| Membrane Capacity | 700 gallons per day (GPD) |
| Pure Water Flow Rate | 1.83 L/min (≈ 0.48 GPM) |
| Filtration Rating | 0.0001 micron |
| Smart Functions | TDS monitoring, filter life display, automatic self-cleaning flush |
| Filter Service Life | 6 – 24 months, depending on water quality and usage |
| Rated Net Water Volume | 4,000 L (≈ 1,050 gal) |
| Inlet Water Pressure | 14.5 – 58 psi (0.1 – 0.4 MPa) |
| Water Temperature | 41 – 100°F (5 – 38°C) |
| Power Supply | 110V AC, standard U.S. household outlet |
| Rated Power | 70 W, built-in booster pump |
| Dimensions (W × D × H) | 16.5 × 6.2 × 15.0 in (419 × 158 × 381 mm) |
| Shipping Box | 18.7 × 7.9 × 19.7 in, approx. 18.7 lb |
| Cabinet Material | Plastic housing, white finish |
| Water Source | Municipal (city) water or microbiologically safe well water |
| Warranty | 1 year from IPW Industries |
| Country of Origin | Made in China for IPW Industries Inc, Santa Ana, CA |
Mind your water pressure. The S9 is rated for inlet pressure up to 58 psi. Many city homes run 60–80 psi, so if yours is on the high side, install an inexpensive inline pressure regulator on the feed line. It protects the pump and fittings and keeps your warranty in good standing.
Getting Set Up
- Turn off the cold-water supply under the sink and open the faucet to relieve pressure.
- Install the feed-water adapter on the cold-water line and connect the supply tubing to the unit's inlet.
- Mount the dedicated drinking-water faucet in an existing sink hole or a new hole in the countertop, and run its tubing to the unit's pure-water outlet.
- Install the drain saddle on the sink drain above the P-trap and connect the drain tubing.
- Stand the unit upright in the cabinet, plug it in, and turn the water supply back on. Check every connection for leaks.
- Open the RO faucet and flush the new filters per the included manual before drinking — the first few minutes of output are for conditioning the membrane.
Keep the drain line clean and downhill. Route the drain tubing with no dips or loops and connect it above the P-trap. A sagging drain line is the most common cause of gurgling noises and slow output on any RO system.
Frequently Asked Questions
Why is there no storage tank?
The S9's booster pump pushes water through a high-output 700 GPD membrane fast enough to fill your glass in real time. That eliminates the tank, the stale water that sits in it, and the pressure drop you get as a tank empties.
How fast does it fill a glass?
At roughly 0.48 gallons per minute, an 8-ounce glass fills in about 8 seconds, and a half-gallon pitcher in about a minute.
How often do I change the filters?
Typically every 6 to 24 months depending on your water and how much you use. The CBPA pre-filter is replaced more often than the RO membrane, and the unit's filter life display tells you when each one is due.
Does it need electricity?
Yes. The built-in pump and smart controls run on standard 110V household power, so the unit needs an outlet under the sink.
What's the warranty?
The Aero·RO S9 is covered by a 1-year warranty from IPW Industries.
Can I use it on well water?
Yes, as long as the well water is microbiologically safe. If your well has high iron, hardness, or sediment, pre-treating it will protect the membrane and extend filter life — our team can help size the right pre-treatment.
Ships from California
Stocked in Santa Ana and shipped the same business day on orders placed before cut-off.
Water Treatment Specialists
Backed by IPW Industries, a water filtration manufacturer — not a drop-shipper.
Install Help
Questions about your sink, pressure, or water source? Call (877) 541-6603 and talk to a real person.
