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Drinking Water Systems
5-Stage Tank Reverse Osmosis
The classic under-sink RO. Proven, simple, affordable.
A traditional reverse osmosis system with a storage tank. Five stages of filtration, a dedicated drinking-water faucet, and decades of track record behind the design. If you want clean drinking water without the tankless price, this is it.
Best for: Households wanting proven RO at a lower price
Inside the system
Features
- 5-stage reverse osmosis filtration
- 100 GPD membrane with pressurized storage tank
- Dedicated drinking-water faucet
- Removes dissolved solids, chlorine and heavy metals
- Simple, widely available replacement filters
- Free installation
What reverse osmosis removes
- Arsenic
- Nitrate and nitrite
- Fluoride
- Lead and heavy metals
- Uranium and chromium-6
- Chlorine and disinfection byproducts
- Sediment and dissolved solids
- Mineral taste and odor
Full specifications
Key specifications
| Type | Tank, under-sink |
| Filtration stages | 5 |
| Production | 100 GPD, stored in tank and poured on demand |
| Faucet | Dedicated, five finishes |
| Cabinet space | Storage tank under the sink |
| Filter changes | Changed by our team |
| Fittings | Quick-connect |
| Pairs with | Any whole-home system, or on its own |
Installation, upkeep & warranty
| Installation | Included: dedicated faucet, drain saddle, cold-water tie-in |
| Location | Under the kitchen sink, or wherever the drinking tap goes |
| Upkeep | Filter changes by our team |
| RO system warranty | 1 year |
| Labor warranty | 1 year from date of purchase |
Warranty on this system
Specifications from the manufacturer's documentation. Component brands and certifications are those of their respective manufacturers. Full warranty terms and a printable spec sheet available on request.
Free water test
Book your water test
Half a minute to fill in. We'll call to find a time that works around you.
- Hardness, chlorine, TDS, iron and pH tested on the spot
- Written results you keep either way
- Evening and Saturday appointments available
Watch
Why the kitchen tap is separate
The things reverse osmosis catches that house filtration cannot, and why it belongs at the sink.
Why the kitchen tap is separate
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More angles
Up close
The 5-stage RO filter bank including the alkaline stage
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A tank reverse osmosis system installed under a customer kitchen sink
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Finishes
Choose a finish for your kitchen
The tap is the only part of this system anyone ever sees, so it comes five ways. Tell us which one at the water test.
Brushed nickel
Chrome
Brushed gold
Matte black
Oil-rubbed bronzeAlso in drinking water systems
Worth a look alongside it
Reviews
From houses that have one
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Free water test
See what is in your water
We run the test at your sink, show you what came back, and tell you honestly what your house needs. Sometimes the answer is nothing at all.