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PRIME WATER, PRIME LIFE

Know exactly what'sin your family's water.

Under-sink reverse osmosis that reduces lead, arsenic, PFOA/PFOS and 90% of total dissolved solids. Installs yourself in about 30 minutes — no plumber, no remodeling, no whole-house price tag.

Reduces 99% of TDS

Third-party lab verified

30-day returns

Taste it. Don't love it? Send it back.

0% APR financing

Prequalify in 60 seconds

Free express shipping

Arrives in 2–8 business days

Best sellers

What most families start with.

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S02 400GPD Tankless Reverse Osmosis System

S02 400GPD Tankless Reverse Osmosis System

S02 400GPD Tankless Reverse Osmosis System

Dual RO membranes plus alkaline mineralization for clean, smooth-tasting water.

$799.00 USD
Sale price  $799.00 USD Regular price  $999.00 USD Save $200
Y04-75GPD Reverse Osmosis System with Tank

Y04-75GPD Reverse Osmosis System with Tank

Y04-75GPD Reverse Osmosis System with Tank

Alkaline remineralization, smart LED control and integrated waterway design.

$559.00 USD
Sale price  $559.00 USD Regular price  $699.00 USD Save $140
Twist & Lock Reverse Osmosis System 30GPD

Twist & Lock Reverse Osmosis System 30GPD

Twist & Lock Reverse Osmosis System 30GPD

Four-stage reverse osmosis under the sink, with cartridges you change by hand in under a minute. Install it yourself in an afternoon.

$490.00 USD
Sale price  $490.00 USD Regular price  $612.00 USD Save $122
5 Stage Shower Filter SF03 Family Pack

5 Stage Shower Filter SF03 Family Pack

5 Stage Shower Filter SF03 Family Pack

Chlorine is what dries your skin and dulls your hair. This takes it out before the water reaches you, and it installs by hand in about two minutes.

$126.00 USD
Sale price  $126.00 USD Regular price  $158.00 USD Save $32

Water dispensers with RO

When the filter should be the furniture.

Free-standing dispensers with reverse osmosis and UV light built in. No cabinet, no plumbing under the sink — hot, cold and filtered water in one piece you actually want on display.

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Water Dispenser with Coffee Maker and Reverse Osmosis

Water Dispenser with Coffee Maker and Reverse Osmosis

Water Dispenser with Coffee Maker and Reverse Osmosis

Hot, cold and single-serve coffee from one unit, fed by a 150 gallon-per-day reverse osmosis system. No bottles, no delivery truck, no cooler rental.

K-Cup brewerRO + UVHot & coldNo plumbing
$1,899.00 USD
Sale price  $1,899.00 USD Regular price  $2,199.00 USD Save $300
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Water Dispenser with Nugget Ice Maker and Reverse Osmosis

Water Dispenser with Nugget Ice Maker and Reverse Osmosis

Water Dispenser with Nugget Ice Maker and Reverse Osmosis

Nugget ice, water at four temperatures and four-stage reverse osmosis with a UV lamp — in one unit. No bottles, no delivery truck, no rented ice machine.

Ice makerRO + UVHot & coldNo plumbing
$3,280.00 USD
Sale price  $3,280.00 USD Regular price  $4,100.00 USD Save $820
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The proof

Tested by an independent lab. Not by us.

Reverse osmosis pushes your tap water through a sediment membrane, a carbon block, and finally an RO membrane — the stage that removes what boiling and pitcher filters leave behind.

90%

of total dissolved solids removed, including heavy metals such as arsenic and mercury. Independently verified.

What it reduces

  • Lead
  • Arsenic
  • Mercury
  • PFOA & PFOS
  • Fluoride
  • Chromium
  • Cadmium
  • Chlorine & chloramine
  • Nitrate
  • Benzene
  • Asbestos
  • Cysts
Reduction by contaminantNSF/ANSI Certified RO Membrane
Total dissolved solidsTDS, ppm 90%
LeadPb 98%
PFOA & PFOSforever chemicals 96%
Chlorine & tastefree chlorine 99%
ArsenicAs (V) 95%

Why trust us yet

We are new. So we put it in writing.

We would rather you test the water in your own kitchen than take our word for it. Here is exactly what we promise, and exactly what we would tell you if you asked us in person.

30 days

Taste it, then decide

Install it, drink the water for a month. If it is not better, send it back for a full refund.

Lab tested

Results you can check

Our reduction figures come from an independent laboratory, and the full report is published, not summarised.

~30 min

You install it yourself

Step-by-step video and every fitting in the box. No plumber.

The math

Bottled water is the expensive option.

Reverse osmosis delivers the same water for pennies per gallon, from the tap you already own.

Bottled water, every year

$720 – $1,200

A family spending $60 to $100 a month

  • Hauling cases home every week
  • Plastic that takes centuries to break down
  • No lab report, no idea what is inside
  • The cost repeats every single year

Water Filter Prime S02

$799

One time — then cents per gallon

  • Unlimited water, straight from your faucet
  • Filters last 6 months to 2 years
  • Independently lab tested, results published
  • DIY install in about 30 minutes, video included
Shop the S02

Questions

Before you buy.

Still unsure? Our team answers within one business day.

What contaminants does the system reduce?

Tested by a third party lab, our RO utilizes a 4-6 stages filtration process, effectively reducing impurities such as PFOA, PFOS, fluoride, heavy metals (e.g., lead, chromium, arsenic), salts (e.g., nitrate, chloride), and large particles.

How often should I replace the filters?

CF Filter: Every 6 months or after filtering 550 gallons, whichever comes first.
CB Filter: Annually or after filtering 1,100 gallons, whichever comes first.
RO Filter: Every 2 years or after filtering 2,900 gallons, whichever comes first.

How easy is it to install the RO?

Our under sink RO system enables easy DIY installation with clear step-by-step instructions and an instructional video for installation.

How does a reverse osmosis water filter system work?

Water first goes through a pre-sediment PP membrane and a carbon block filter, which is where contaminants like sand, rust, chlorine, and others are reduced. After running through another sediment membrane to remove even more impurities, the water is subjected to a multi-stage composite filter design with a reverse osmosis system — reverse osmosis membrane. This step reduces 90% of TDS and heavy metals, including arsenic and mercury.

An undersink RO system can provide you safe and clean drinking water all the time right at home. Our reverse osmosis systems adopt advanced filtration technology, help you save your monthly water bill.

What are the benefits of RO water?

The RO membrane can reduce a wide range of potentially harmful contaminants from tap water, such as:

  1. TDS, chlorine, bad taste and odor, chloramine, scale, and turbidity.
  2. Carcinogen like chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, and ferric oxide.
  3. Heavy metals like lead, mercury, barium, copper, radium 226/228, aluminum, and others.
  4. Micro organic contaminants, such as cysts.
  5. Inorganic pollutants, such as arsenic, inorganic arsenic compounds, and fluoride.
  6. Organic pollutants like asbestos, benzene, formaldehyde, trichloromethane, chlordane, PFOA & PFOS, and others.

Cook better with Reverse Osmosis Water Filter

The water filtered by the RO system is free of chlorine and limescale, which often affects the flavor of the food. Similarly, RO water is more suitable for tea and coffee. Filtered water from the RO system is free of heavy metals and organic compounds, making it ideal for drinking. Adults and young children can drink RO filtered water to improve their health. For infants, it can also be used in combination with milk powder to prepare a milk drink.

Save Money with Reverse Osmosis Water Filter

A consumer study showed that American consumers spent $15 billion annually on bottled water. However, getting a reverse osmosis water system can guarantee a constant supply of clean and filtered water, at just pennies per gallon.

The plastic bottles used in bottled water are often not recycled; they end up in landfills where they could take hundreds of years to decompose. With an RO system, you can spend less money on accessing pure and drinkable water, while protecting the environment.

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Prime Water, Prime Life

Clean water is not a luxury. It is a Saturday project.

Pick your system, install it yourself, and taste the difference this week. If it is not better, send it back within 30 days.

Free express shipping · 30-day returns · 0% APR financing available

Get 10% off your first order.

Plus a short guide to reading your city's water quality report, so you know what you are actually filtering.

One email a month at most. Unsubscribe any time.