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Honest Water Co
Five-stage reverse osmosis system with pressurized storage tank and dedicated faucet

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

What you get

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

Full specifications

Reverse osmosisDedicated faucet includedFive faucet finishes

Key specifications

TypeTank, under-sink
Filtration stages5
Production100 GPD, stored in tank and poured on demand
FaucetDedicated, five finishes
Cabinet spaceStorage tank under the sink
Filter changesChanged by our team
FittingsQuick-connect
Pairs withAny whole-home system, or on its own

Installation, upkeep & warranty

InstallationIncluded — dedicated faucet, drain saddle, cold-water tie-in
LocationUnder the kitchen sink, or wherever the drinking tap goes
UpkeepFilter changes by our team
RO system warranty1 year
Labor warranty1 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
Full warranty terms and exclusions →

Specifications from the manufacturer’s documentation. Component brands and certifications are those of their respective manufacturers.

More photos

A closer look

The 5-stage RO filter bank including the alkaline stage
The 5-stage RO filter bank including the alkaline stage
A tank reverse osmosis system installed under a customer kitchen sink
A tank reverse osmosis system installed under a customer kitchen sink

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 when you order.

Brushed nickel drinking water faucet
Brushed nickel
Chrome drinking water faucet
Chrome
Brushed gold drinking water faucet
Brushed gold
Matte black drinking water faucet
Matte black
Oil-rubbed bronze drinking water faucet
Oil-rubbed bronze

Also in drinking water systems

HW800 AlkaPro tankless reverse osmosis system with its colour-matched drinking water faucet

HW800 AlkaPro Tankless RO

800 gallons a day, 7 stages, no bulky tank under your sink.

View details →

Reviews

From people who had one installed

System info and pricing

Find the right system for your water

Call or fill out the form, tell us what you're seeing at the tap, and we'll tell you which system fits your home and what it costs. There's no system that fits every house.

  • Complete installed price
  • Free installation
  • Lifetime warranty