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
Drinking Water Filters
Products
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.
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.
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.
Get a water system that fits 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
Countertop RO (Zero‑Install) → Plug in, fill, drink. Perfect for apartments, condos, and renters. High‑capacity options to avoid constant refills.
Undersink RO → Hidden, high‑flow drinking water at the faucet. Great for kitchens that want max capacity and clean counters.
Why RKIN for Easy Drinking Water
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
Frequently Asked Questions
Do I need plumbing?
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.
