e Filter Water gives you expert help in purchasing a water filter to filter water. We have water purification purifier systems available from CUNO, Kenmore, GE, Whirlpool, Culligan, Pentek, Aquasana, Watts Premier, Pur, Brita, Crystal Quest and Polar Water Filters brand.

Top 3 Undersink Reverse Osmosis Water Filter Systems

 
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Brand/Model
 Watts WQC4RO11-50 Kwik Change Reverse Osmosis System 50 gpd CUNO Water Factory SQC-3-HF Reverse Osmosis Drinking Water Filtration System Watts Premier 500023 WP-5 Reverse Osmosis Water Filter System 24 gpd
System Price
 $269.99 $370.79 $0.00
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Filter Change Cost Over 2 Yrs
 $213.97 $326.44 $201.97
Filtration per Day
 50 Gal 33 Gal 24 Gal
Smallest Particle Size Filtered
The lower the micron rating the more particles the water filter will trap
 .0001 mic .0001 mic .0001 mic
eFilterWater Review Grade
eFilterWater Reviews the systems we sell for the following:
  • Taste of water produced
  • Appearance/size of system
  • Ease of installation
  • Ease of changing filters
And we give it a grade to tell you what we think, so you don't get any surprises!
A A B
Separate Tank Size
 4.4 gal 2.6 Gal 3 gal
Warranty
 1 yr 10 yr 3 yr
Removes (Partial List - see product page for complete specs)
   Chlorine Not Reported 96.80% Not Reported
   Lead 98.80% 98.60% 98.60%
   Cysts/Bacteria 99.99% 99.99% 99.99%
   Turbidity 99% 98% 97.50%
   Total Dissolved Solids (TDS) 97% 96% 96.80%
Operating Pressure Range
Operating pressure range is the min and max range of water pressure that the system will operate under for optimal production/performance. Most homes on city water average between 55 psi - 65 psi of static water pressure. More water pressure is not necessarily a good thing for some systems.
35-100 psi 40-100 psi 40-100 psi
Brand/Model
 Watts WQC4RO11-50 Kwik Change Reverse Osmosis System 50 gpd CUNO Water Factory SQC-3-HF Reverse Osmosis Drinking Water Filtration System Watts Premier 500023 WP-5 Reverse Osmosis Water Filter System 24 gpd


An undersink reverse osmosis water filter system can provide you with great tasting water while protecting your health. Remove contaminants in your water including chlorine, lead, bacteria, and cysts. The undersink reverse osmosis water filter system is ideal for homes where counter top space is scare, and a sleek appearance is a must, and convenience key. An undersink reverse osmosis water filter has its own separate faucet and requires a separate hole near your sink.

Shop all undersink reverse osmosis water filter systems.
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365 Day Return Policy
This system has been tested for various contaminants. Just because a contaminant is Not Reported it does not mean this system does not reduce this contaminant. We pull our data from NSF/WQA Performance Data Sheets for the system. They do not include reduction results for every contaminant tested. See the product page for full reporting in the Performance Data Sheet.