U1-W Space-Saving 4-in-1 Water Filter System
- Apartment-Friendly
- No Tools Needed
- Space-Saving
Shipping: Ships to the 48 contiguous states and Washington, D.C. Our items ship for $7.99 on orders under $80 and free on orders of $80 or more. Partner-shipped items have shipping calculated at checkout, and select large items have a flat shipping charge shown on the product page. Shipping policy
Returns: Return unused items in original packaging within 14 days of delivery. You pay return shipping and a 20% restocking fee applies (both waived if the item arrived damaged or we sent the wrong item). Some items are final sale and are marked on their product pages. Refund policy
Want an advanced water filter system?
We want you to have the best quality water in your home…
That’s why U1 has an advanced filtration system with five stages. It is designed to reduce contaminants including Fluoride, Chlorine and heavy metals like lead.
Plus, U1 has an intelligent touch control panel, so you can easily see the status of your filter. It also has a UV Light that keeps water fresh when the system is not in use.
So, how does U1 Work?
1. Fill the water tank.

2. Place the tank on the system and let it do all the work.
3. Once your water is ready, select your temperature (hot or cold), and enjoy.
U1 doesn’t require installation, so you can easily place it on your countertop - perfect for people who live in apartments, condos, and RVs.
Customizable temperature
Do you ever wish your water filter system had hot or cold water?
U1 has a customizable default water temperature setting so that your water is always set to the temperature of your liking. Plus, there’s an instant hot water option that’s perfect for baby formula, tea, instant coffee, and more!
The display will also show the Hydrogen content and water quality readings, so you’ll always know your system is working properly.
Alkaline, hydrogen-enriched water
U1 includes a polishing Alkaline post-filter that adds minerals, calcium and magnesium back to filtered water for better taste.
It also increases the alkalinity of the water to a perfectly balanced level of 7-8 pH, similar to spring water.
Plus, U1's hydrogen-infused water delivers a negative ORP of 340.
Smart control panel and RKIN app
You can monitor your filtered water quality and filter status with U1’s intelligent touch control panel or the RKIN app, regardless of whether you are nearby or miles away. The RKIN app is compatible with the NEW U1-W model only.
2-year filter bundle
If you opt to add our 2-year filter bundle to your order, you'll receive two annual replacement filter cartridge kits, two hydrogen PEM modules, and one reverse osmosis membrane.
You'll get three years of use with this add-on!
U1 vs Zero Installation Countertop RO Water Filter




Ships directly from the brand; shipping is calculated at checkout.

