Up to ~600–800 gallons/day
Tankless Reverse Osmosis
On-demand RO with no bulky storage tank.
Details & specsBest value
Illustrative product render. Your exact equipment is sized to your water test.
5 stages
5-Stage Reverse Osmosis
Proven under-sink RO with a storage tank.
Best for: Households that want RO at a lower price
The classic reverse osmosis setup: five stages of filtration fill a small storage tank under your sink, ready at a dedicated faucet.
- Five stages of filtration
- Storage tank keeps water ready to pour
- Affordable filter replacements
- No electricity required
- Free water test first
- Free installation by licensed plumbers
- 1-year warranty
In the box
What’s included
- 5-stage filter assembly
- RO membrane
- Pressurized storage tank
- Dedicated drinking water faucet
- Free installation by a licensed, insured plumber
How it works
Step by step
- Sediment filter
Catches sand, silt, and rust.
- Two carbon filters
Reduce chlorine to protect the membrane and improve taste.
- RO membrane
Holds back most dissolved solids.
- Post-carbon filter
A final polish as water leaves the tank.
Learn more: How reverse osmosis works
What to expect
Install day, step by step
- Free water test firstWe test at your tap and confirm this is the right system and size.
- Professional installA licensed, insured plumber installs it with a bypass valve.
- We test the resultWe test your treated water so you can see the difference on the spot.
- Walkthrough & clean-upWe show you how it works and leave your space as clean as we found it.
Complete your system
Recommended add-ons
Add any of these to your quote. We’ll confirm which ones your water actually needs during your free water test.
Remineralization FilterPuts calcium and magnesium back into RO water.
Full specifications
Specs & requirements
Typical specifications for this class of system. Exact model specs are confirmed in your quote.
Key specs
- Type
- Reverse osmosis with storage tank
- Stages
- 5 (sediment, 2× carbon, RO membrane, post-carbon)
- Membrane
- Approx. 50–75 gallons per day
- Storage tank
- Approx. 3.2 gallon (about 2 gallons usable)
- Faucet
- Dedicated drinking water faucet
Operating requirements
- Operating pressure
- 40–80 psi
- Water temperature
- 40–100°F
- Electrical
- None required
- Drain
- Connects to sink drain
Components & certifications
- Unit
- [PLACEHOLDER: brand/model]
- Certifications
- [PLACEHOLDER: e.g. NSF/ANSI 58 — confirm]
Also in drinking water
Not sure this is the right system?
A free in-home water test tells us exactly what your water needs. We’ll recommend the right size and setup.