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Reverse Osmosis Under Sink Water Filtration System

You want the highest-quality drinking water, without the waste of traditional reverse osmosis systems. The Capella Reverse Osmosis Under Sink Water Filtration System provides it, with up to 20x greater wastewater efficiency and certified reduction of 86 contaminants.

Now: $215.99
(You save $54.00 )


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Our most efficient reverse osmosis filtration system yet.

Capella combines technology and science to deliver a reverse osmosis water filtration system that stands out among the rest. It’s certified by the Water Quality Association (WQA) to reduce 86 contaminants found in drinking water, including DEET, flame retardants, prescription drugs, PFAS “forever chemicals,” and more. The end result? Safer water, straight from your sink.

Traditional reverse osmosis systems can waste up to 20 gallons of wastewater for every gallon of clean water that they provide. We knew we had to do better. That’s why Capella features a 1:1 ratio of wastewater to filtered water, making it one of the most efficient and effective reverse osmosis systems on the market. It's healthier hydration for you—and for the planet, too.

  • holds WQA Gold Seal Certification

  • three-stage filtration of known and emerging contaminants

  • industry-leading, patented water-saving technology

  • includes chrome air-gap faucet with LED filter-change indicator

  • designed for easy installation and maintenance

Item #RC250

Full Features

Water Quality Association certification
  • holds WQA Gold Seal Certification
  • certified under NSF/ANSI standards 42, 53, 58, 372, and 401*
  • reduces 86 contaminants found in drinking water, including pharmaceuticals, heavy metals, and industrial chemicals
  • efficient reduction of known and emerging contaminants
  • reduces VOCs, particulates, chlorine, and odors
  • see Performance Data Sheet for full list of contaminants reduced
Powerful 3-stage filtration
  • first-stage activated carbon pre-filter reduces sand, rust, and particulates
  • second-stage reverse osmosis membrane filter reduces known and emerging contaminants
  • third-stage carbon block filter reduces lingering VOCs, chlorine, and odors
  • system capacity rating of 300 gallons
Patented water-saving technology
  • patented eco-efficient reverse osmosis (E2RO) membrane filter allows for a high clean water recovery rate
  • more efficient than traditional reverse osmosis filters
  • industry-leading 1:1 clean/wastewater ratio
  • up to 20x greater efficiency over competitive reverse osmosis filtration systems
Installation and maintenance
  • designed for home DIY installation
  • pre-installed faucet tubing and quick-connect design simplify installation
  • includes modern, air gap faucet to prevent backflow and contamination
  • never miss a filter change—faucet features LED filter-change indicator light
  • easy “twist-and-seal” filter changes
  • replace E2RO membrane filter every 24 months; carbon filters every 6 months

Not up to installing it yourself?

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Under sink
13.5"(L) x 3.75"(W) x 13.5"(H) (assembled filters & hanger)
14.5"(H) x 8.5"(D) (tank with stand)
11.4 lbs
Tank Capacity
3.2 Gallons
(Max. water storage volume is appx. 1.6 gallons; will vary depending on incoming operating pressure)
Min/Max Operating Pressure
35 - 100 psi
Min/Max Water
Feed Temp
39 °F- 100 °F
Faucet Flow Rate
0.26 – 0.37 gallons per minute (gpm) at incoming water pressure of 35–100 psi
Rated Service Flow
0.5 gallons per minute (gpm)
Filters & Lifespan
Activated Carbon Plus Filter & Carbon Block Filter (RF-30): 6 months
Eco-Efficient Reverse Osmosis (E2RO) Membrane Filter (RF-50): 24 months
1-year warranty provided by US-based customer service team
Model Number/SKU
Certifications & Notices
  • WQA

* See performance data sheet for more details. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.