CTO Filter for Reverse Osmosis Under Sink

In stock

Membrane Solutions®

CTO Filter is an important part of the reverse osmosis water filter under the sink, strong filtering capacity of 15,000 gallons of water. Able to filter pollutants smaller than 5 microns, it removes most odors and smells. Turn polluted water back to pure.


  • Replaced in seconds
    Membrane Solutions' Switch-and-Lock design, allows you to switch on & off the filter in a few seconds, no need to disassemble the whole system
  • Long last lifetime
    According to your water quality, this purifier can last about 6-12 months, no need to wash, simply throw it away when it finished its lifetime
CTO Filter

Reverse Osmosis Under Sink for Home 

This large carbon filter cartridge is made of pure coconut shell carbon blocks, wrapped in food-grade polypropylene non-woven fabric for fine water filtration while preventing carbon particles from seeping into the water. Tested by an independent third party to meet NSF 42 material safety standards.

Our carbon filters can filter up to 15,000 gallons of water, depending on usage and local water quality. The high-porosity design helps prevent clogging of the cartridge before its adhesion capacity is exhausted, thereby maximizing carbon utilization while maintaining a low-pressure drop. It is recommended that the average home be replaced every 3-6 months for optimal performance.

reverse osmosis under sink for home
CTO filter for under sink ro water filtration

Fine Filtering Membrane of Under Sink RO System 

Optimized as a sediment and carbon block filter, it filters contaminants as small as 5 microns, removing unwanted pigments, odors, and up to 98% chlorine, dramatically improving water quality throughout your home.

Compatible with Most Water Filtration 

Fits most 4.5 x 10" (approx. 11.4 x 25.4 cm) blue and clear filter housings (approx. OD top 7" (approx. 17.8 cm) and 10" (approx. 25.4 cm) whole house water systems.

CTO filter for more water filtration