July 16, 2025

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10 Best under sink reverse osmosis filters of 2025

Save up to 43% off

Best Choice

1

Clicked 607 times in the last month

Waterdrop
Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet

18% Off
Main highlights

High Capacity Filtration
600 GPD output with 8-stage filtration for pure water.

Ideal for Home Use
Perfect for kitchens needing efficient, space-saving water purification.

Praised for Taste
Customers love the clean, bottled-water taste.
9.8

Exceptional

Our Rating

9.5
Instruction

9.5
Flavor

9.3
Easy installation
How do we rank?

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Value for Money

2

iSpring
iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink, Patented Top-Mounted Faucet Design for Easy Installation

13% Off
Main highlights

Advanced Filtration System
6-stage filtration with alkaline remineralization for pure, healthy water.

Ideal for Home Use
Perfect for under-sink installation, providing clean water daily.

Outstanding Customer Service
Praised for responsive, helpful support and easy issue resolution.
9.7

Exceptional

Our Rating

9.7
Flavor

9.5
Simple to use

9.3
lasts a long time
3

APEC WATER
APEC Water Systems ROES-50 Essence Series Top Tier 5-Stage WQA Certified Ultra Safe Reverse Osmosis Drinking Water Filter System

20% Off
Main highlights

Comprehensive Water Filtration
Removes up to 99% of impurities, including arsenic, chlorine, and lead for superior water quality.

Ideal for Home Use
Perfect for tap and well water, offering unlimited clean water superior to bottled options.

Highly Praised Water Taste
Customers love the crisp, refreshing taste, often exceeding expectations.
Key specs
- Filtration Stages:5 stages
- Installation Type:Under-sink
- Dimensions:16 x 5.25 x 17.5 inches
- Contaminants Removed:Arsenic, chlorine, lead, fluoride
- Flow Rate:N/A
9.5

Excellent

Our Rating

9.7
worth the money

9.7
Flavor

9.3
Instruction
4

Membrane Solutions
Membrane Solutions Reverse Osmosis Filter Replacement, 75 GPD Complete Replacement Filter Set For Under Sink 5-Stage Reverse Osmosis Replacement Water Filter System
Main highlights

Key Features
Universal 10-inch size fits most RO systems, high adsorption with a 5-micron rating, easy installation, NSF42 and ISO9001:2015 certified for safety.

Ideal Use Cases
Perfect for under-sink RO systems in homes for drinking, cooking, showering, plus use in aquariums and gardens to ensure cleaner, healthier water.

Customer Praise
Most reviews highlight the ease of installation and noticeable improvement in water taste and purity, making it a highly recommended replacement filter.
Key specs
- material:Food-grade materials
- pore size:5 micron
- installation:Easy Installation - Inline
- filtration efficiency:Removes 99% contaminants
- dimensions:12.68 x 12.13 x 3.35 inches
9.4

Excellent

Our Rating

9.3
Easy installation

9.1
worth the money

8.4
Flavor
5

PUROFLO

Puroflo ERO 5 pc Reverse Osmosis Filters 1 Year Set, Under Sink RO Water Filter System Kit Compatible with Most 10" Water Filtration System w/Water Filter Wrench
9.1

Excellent

Our Rating

9.1
worth the money

9.1
Easy installation

8.9
Flavor
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6

EXPRESS WATER
Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD

43% Off
Main highlights

Superior Contaminant Removal
Removes up to 99.99% of lead, chlorine, fluoride, and more.

Versatile Installation Options
Ideal for under-sink installations, also fits in basements.

User-Friendly Installation
Easy setup praised by customers for its simplicity.
8.8

Very Good

Our Rating
7

Waterdrop
Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech, WD-G2-W

26% Off
Main highlights

Efficient Filtration and Space Saving
The G2 system offers advanced filtration and a compact, tankless design for efficient water purification and space savings.

Ideal for Homes with High TDS
Perfect for homes needing to reduce high TDS levels, ensuring clean, bottled-water taste.

Highly Praised Installation Ease
Customers frequently praise the system's straightforward and quick installation process.
8.7

Very Good

Our Rating

9.5
Easy installation

9.5
Flavor

9.1
Instruction
8

iSpring

iSpring F6K75 NSF Certified Replacement Under-Sink Water Filters, 6-Stage Reverse Osmosis RO Water Filtration Systems with Alkaline Mineral Filter, 6-months Replacement Supply Set, 6 Count (Pack of 1)
8.6

Very Good

Our Rating

9.5
worth the money

9.5
Flavor

9.3
Easy installation
9

APEC WATER

APEC Water Systems FILTER-SET-ES High Capacity Replacement Pre-Filter Set For Essence Series Reverse Osmosis Water Filter System Stage 1-3

10% Off
8.5

Good

Our Rating

9.3
Flavor

9.3
Easy installation

9.1
worth the money
10

Ecoviva

Ecoviva Under Sink Reverse Osmosis System, Fast Dispense Mode, No Drilling Required, 8-Stage Water Filtration System, 600 GPD Water Purifier, 2.5:1 Pure to Drain, Reduce PFAS, NSF/ANSI 58 Certified
8.4

Good

Our Rating

10 Best under sink reverse osmosis filters of 2025

1

Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet

9.5

9.5

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink, Patented Top-Mounted Faucet Design for Easy Installation

9.7

9.5

9.3

3

APEC Water Systems ROES-50 Essence Series Top Tier 5-Stage WQA Certified Ultra Safe Reverse Osmosis Drinking Water Filter System

9.7

9.7

9.3

4

Membrane Solutions Reverse Osmosis Filter Replacement, 75 GPD Complete Replacement Filter Set For Under Sink 5-Stage Reverse Osmosis Replacement Water Filter System

9.3

9.1

8.4

5

Puroflo ERO 5 pc Reverse Osmosis Filters 1 Year Set, Under Sink RO Water Filter System Kit Compatible with Most 10" Water Filtration System w/Water Filter Wrench

9.1

9.1

8.9

6

Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD

7

Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech, WD-G2-W

9.5

9.5

9.1

8

iSpring F6K75 NSF Certified Replacement Under-Sink Water Filters, 6-Stage Reverse Osmosis RO Water Filtration Systems with Alkaline Mineral Filter, 6-months Replacement Supply Set, 6 Count (Pack of 1)

9.5

9.5

9.3

9

APEC Water Systems FILTER-SET-ES High Capacity Replacement Pre-Filter Set For Essence Series Reverse Osmosis Water Filter System Stage 1-3

9.3

9.3

9.1

10

Ecoviva Under Sink Reverse Osmosis System, Fast Dispense Mode, No Drilling Required, 8-Stage Water Filtration System, 600 GPD Water Purifier, 2.5:1 Pure to Drain, Reduce PFAS, NSF/ANSI 58 Certified

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