Drinking Water Filters

RKIN Drinking Water Filters

Stop hauling bottles and overcomplicating clean water. Get a water system that fits your space and your life.

  • Removes bad taste and common contaminants for better coffee, tea, and cooking
  • Ditch bottled water, reduce plastic waste, save money
  • Sleek design, fast shipping, clear upkeep costs

Pick Your Setup:

  1. Countertop RO (Zero‑Install) → Plug in, fill, drink. Perfect for apartments, condos, and renters. High‑capacity options to avoid constant refills.
  2. Undersink RO → Hidden, high‑flow drinking water at the faucet. Great for kitchens that want max capacity and clean counters.

Need help choosing a Water System? Call us 1-800-803-4551

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Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting
Woman in a kitchen holding a glass of water with the word 'CHLORINE' displayed.
Woman in a kitchen with 'PFAS' text overlay
Woman holding a glass of water in a kitchen with 'LEAD' text overlay
Woman holding a glass of water in a kitchen with 'Hardwater' text overlay
Woman holding a glass of water with a flower, with the word 'PESTICIDES' displayed.
Woman in a kitchen with 'MEDS' logo overlay
Woman holding a glass of water with a blue bacterium floating above it, set against a blurred indoor background.
Woman in a red sweater holding a bottle with 'BOTTLE' text in a kitchen setting

Why RKIN

  • 3rd party-tested

    Performance you can see, taste, and measure from day one

  • No‑surprise upkeep

    Transparent filter life and replacement costs before you buy

  • Quick‑change filters

    Simple, clean, no tools

  • Financing Available

    Flexible payment plans; own the solution, not the problem

  • Fast, in‑stock shipping

    Get clean water sooner

  • Lifetime Support

    Expert help from setup to maintenance

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Designed for Daily Life

  • Bigger‑tank

    Fast‑fill options so you aren’t refilling all day

  • Intuitive controls

    Maintenance reminders - no “mystery lights”

  • Looks great

    On your counter; installs cleanly under your sink

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RKIN water filters for drinking water are based on powerful reverse osmosis technology. The best possible water purity combined with the lowest cost per gallon of purified water make our products an obvious choice for environmentally conscious consumers.

OnliPure™ The specialty Ion Exchange Media inside our OnliPure Post Filter reduces any leftover contaminants after the Reverse Osmosis process to zero TDS. Measure and confirm from your home with a simple TDS meter.

AlcaPure™ Polishing Alkaline Post Filter returns beneficial minerals – Calcium and Magnesium to purified water for the best taste. It also increases the alkalinity of the water to a perfectly balanced level of 7-8 pH.

FAQ

Do I need plumbing?

Countertop: no. Undersink: basic tools or any handyman.

Apartment‑friendly?

Yes - countertop models plug in and move with you.

Does it need electricity?

The Countertop Water Filter uses a standard outlet. The Flash undersink water filter operates on water pressure, eliminating the need for power.

How hard is maintenance?

Quick, clean filter swaps. Clear schedule and costs listed upfront.

More questions?

Check out individual products for product details or call us at 1-800-803-4551.

Replacement cartridges and accessories

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