Best sellerDrinking Water Systems
HW800 AlkaPro Tankless RO
800 gallons a day, 7 stages, no bulky tank under your sink.
Tankless reverse osmosis that filters down to 0.0001 microns — fine enough to take out lead and other heavy metals, dissolved solids, chlorine and common contaminants. Because it's tankless, you get water on demand and your under-sink cabinet back.
Best for: Anyone who wants better drinking and cooking water
What you get
Features
- 800 GPD tankless reverse osmosis
- 7-stage filtration at 0.0001 micron precision
- Removes lead and other heavy metals, dissolved solids and chlorine
- Coconut-shell carbon block post-filter for taste
- Faucet color-matched to your appliances
- Quick-connect fittings — filter changes you can do yourself
Full specifications
Key specifications
| Type | Tankless, under-sink |
|---|---|
| Filtration stages | 7 |
| Production | 800 GPD, made on demand |
| Flow rate | 0.53 GPM |
| Filtration precision | 0.0001 micron |
| Waste ratio | 2:1 |
| Remineralization | Built-in alkaline stage |
| Faucet | Dedicated, five finishes |
| Cabinet space | No storage tank |
| Filter changes | Quick-connect cartridges, DIY |
| Monitoring | Faucet-mounted monitor |
| 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 | Owner-replaceable quick-connect cartridges |
| Certification | NSF/ANSI 58 |
| RO system warranty | 1 year |
| Labor warranty | 1 year from date of purchase |
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
Warranty on this system
- 1 year
- The RO system
- 1 year
- Installation labor
- 5 years
- Media and filter stages
Specifications from the manufacturer’s documentation. Component brands and certifications are those of their respective manufacturers.
Watch
Reverse osmosis at the kitchen sink
What reverse osmosis removes that a whole-home system can't, and why it goes at the drinking tap. From the /lp/single-faucet-ro landing page.
More photos
A closer look
Colour matched
Pick a faucet that matches your kitchen
The drinking water faucet is the only part of this system you actually see, so it comes in five finishes. Tell us which at the water test.
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Reviews
From people who had one installed
“I had hard water issues which was causing stains on sanitary, so I started to find a solution and came up with this company because there prices were reasonable. It was a clean installation on time and I feel a huge difference in water quality afterwards.”
Muhammad HafeezGoogle review · Sep 2024“I definitely recommend honest water Co to friends and family. Sales man visited our home and conducted water test before and after installation. Installation took over 2 hours without any hassle. Price is also very reasonable l.”
janardhan VejandlaGoogle review · Sep 2024“I just had my whole house water system and reverse osmosis system installed by Honest Water Co, and it was a great experience. Both appliances occupy small spaces. Colt was the responsible sales person and Kyle the installer. Both did a great job, and the communication was fast and efficient.”
LaGoogle review · Aug 2026Free water test
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