Best Reverse Osmosis Systems (Updated August 2025)

Let Buyer's Report help you enjoy safe, great tasting water at home, with the best reverse osmosis systems available today.

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1
Best Overall
7-Stage Reverse Osmosis System NU Aqua

7-Stage Reverse Osmosis System

10.0 (1,446 reviews)
  • 100 Gallon per day output easily meets the needs of large families
  • Alkaline remineralization adds back healthy minerals
  • Removes up to 99.99% of all contaminants
  • Cost effective & environmentally safe
  • Easy under sink installation, pre-assembled
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Picked by 234 people today

2
Countertop Reverse Osmosis System SimPure

Countertop Reverse Osmosis System

9.9 (3,092 reviews)
  • 1.3 gallon tank meets family hydration needs
  • Efficiently removes 99.99% of harmful contaminants
  • Simply plug it in & enjoy purified water instantly
  • Cost effective & sustainable design
  • Includes pre-installed filters & removable drip tray
32% Off CHECK PRICE Amazon

Picked by 285 people today

3
G2P600 Reverse Osmosis System Waterdrop

G2P600 Reverse Osmosis System

9.8 (1,549 reviews)
  • Save 8x water, fewer water bills & more sustainable
  • Suitable for extended family & parties, only 3 minutes for 14 bottles
  • Tankless design, 2:1 drain ratio & easy installation
  • Use waste water to mop the floor, wash your car, do laundry, etc
  • Saves 70% of under-sink space & prevents recontamination
19% Off CHECK PRICE Amazon

Picked by 151 people today

4
Alkaline UV Reverse Osmosis System SimPure

Alkaline UV Reverse Osmosis System

9.7 (997 reviews)
  • Produces up to 400 gallons per day of pure water
  • Exclusively designed to restore the natural alkalinity & mineral balance of water
  • Remarkable 1.5:1 pure-to-drain ratio minimizes waste
  • UV sterilization eliminates bacteria, algae & other microorganisms
  • Eco-friendly & cost effective system
29% Off CHECK PRICE Amazon

Picked by 280 people today

5
G3 Reverse Osmosis System Waterdrop

G3 Reverse Osmosis System

9.6 (3,403 reviews)
  • Effectively reduce heavy metals in tap water & improves water quality
  • Gets one cup of purified water in 8 seconds without waiting
  • Tankless design frees up over 70% of under sink storage space
  • Automatic flushing function designed to ensure freshness in every sip
  • NSF/ANSI 42, 58 & 372 certified for TDS reduction & lead-free material
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Picked by 282 people today

6
G2 Reverse Osmosis System Waterdrop

G2 Reverse Osmosis System

9.5 (1,956 reviews)
  • Enjoy natural minteral water at home
  • Excellent filter combination to more efficiently filter out impurities
  • Activated carbon block reduces most contaminants
  • Tankless RO has a low drain ratio of 1:1 & saves water waste by 300%
  • Fast water flow rate of up to 400 GPD, easy installation
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Picked by 102 people today

7
D6 Reverse Osmosis Water Filter System Waterdrop

D6 Reverse Osmosis Water Filter System

9.4 (802 reviews)
  • 6 Stage filtration eliminates 1000+ contaminants
  • Smart LED display shows real time TDS levels & filter life reminder
  • Innovative internal pump & a larger filter surface
  • Low drain ratio saves up to 450% water
  • Push-in design allows filter replacement in 2 seconds with no tools
28% Off CHECK PRICE Amazon

Picked by 102 people today

8
3-Stage Reverse Osmosis System NU Aqua

3-Stage Reverse Osmosis System

9.3 (1,169 reviews)
  • Impressive water filtration rate of 600 gallons per day
  • Specially designed to remove up to 99% of water impurities
  • Three-stage filter process & a 2:1 pure-to-waste water ratio efficiency
  • Includes smart color changing LED counterop faucet
  • Slim & sleek space saving tankless design
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Picked by 213 people today

9
Tankless Reverse Osmosis System SimPure

Tankless Reverse Osmosis System

9.2 (1,081 reviews)
  • Delivering an impressive 0.4 gallons per minute
  • CF+RO filter can save 1,057 barrels of water
  • Reduces wasted water by 600%
  • Ultra-high precision filtration at 0.0001 microns
  • NSF/ANSI 58 certified, BPA free plastic
6% Off CHECK PRICE Amazon

Picked by 125 people today

Top Rated Reverse Osmosis System

1
Best Overall
7-Stage Reverse Osmosis System NU Aqua

7-Stage Reverse Osmosis System

10.0 (1,446 reviews)
  • 100 Gallon per day output easily meets the needs of large families
  • Alkaline remineralization adds back healthy minerals
  • Removes up to 99.99% of all contaminants
  • Cost effective & environmentally safe
  • Easy under sink installation, pre-assembled
CHECK PRICE Amazon

Picked by 234 people today