10 Best under sink countertop filtrations of 2025

Save up to 37% off

Best Choice

1

Waterdrop
Waterdrop G2P600 Reverse Osmosis System, 600 GPD Tankless RO Water Filter System, Under Sink RO System, 7 Stage Filtration, 2:1 Pure to Drain, Reduce TDS, FCC Listed, USA Tech

16% Off
Main highlights

High Efficiency and Space Saving
The G2P600 system delivers 600 gallons/day with tankless design, saving 70% under-sink space.

Ideal for Large Families and Offices
Provides fast, continuous water flow, perfect for big families and companies.

Easy Installation and Maintenance
Praised for simple setup and quick filter changes, even for novices.
9.8

Exceptional

Our Rating

9.5
Easy installation

9.5
Flavor

9.3
Instruction
How do we rank?

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Based on millions of stores and reviews

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Value for Money

2

Waterdrop

Waterdrop WD-T3-C Reverse Osmosis Water Filter, NSF/ANSI 372 Certified, 8-Stage Under Sink RO Water Filter, 450GPD Tankless Water Filtration System, 2:1 Pure to Drain, BPA Free, Plug-in Required
9.5

Excellent

Our Rating
3

CuZn
Under Sink Water Filter for Sink Faucet by CuZn, 5 Year Filtration Life, Reduces PFAs, PFOS, Lead, Chlorine, Improves Taste of Tap Water with NSF/ANSI 42 & 372 Certified High Performance

20% Off
Main highlights

High Capacity and Longevity
The CuZn UC-200 offers up to 5 years of filtration with a high capacity of 50,000 gallons, ensuring long-lasting performance.

Ideal for Municipal Water
Perfect for municipal water purification, not suitable for private well water, maintaining essential minerals without reducing TDS or PPM.

Praised Customer Service
Customers frequently commend CuZn's responsive customer service and the ease of installation, enhancing the overall user experience.
9.2

Excellent

Our Rating

9.9
Easy installation

9.9
Instruction

9.7
Flavor
4

Waterdrop
Waterdrop TSA 8 Layer Under Sink Water Filter System, Under Sink Water Filtration System, Reduces PFAS, PFOA/PFOS, Fluoride, Chlorine, Bad Taste & Odor, NSF/ANSI 42 Certified Element, USA Tech
Main highlights

Multi-Stage Filtration Efficiency
8-stage filtration reduces PFAS, heavy metals, chlorine, and more.

Perfect for Home Kitchens
Ideal for households needing pure, great-tasting water directly.

Highly Praised Water Taste
Customers love the improved taste compared to other filters.
9.1

Excellent

Our Rating

9.3
Flavor

9.1
Instruction

9.1
worth the money
5

Waterdrop
Waterdrop WD-TSA-UF 0.01 μm Ultra Filtration Under Sink Water Filter, Under Sink Water Filtration System 9 Stage Filtration, Reduces Chlorine, Taste and Odor, Fluoride, Advanced USA Tech

20% Off
Main highlights

9-Stage Filtration System
Reduces chlorine, taste, odor, fluorides, and heavy metals for pure water.

Ideal for Home Use
Perfect for under-sink installation, enhancing water quality at home.

Easy Installation Praised
Customers love the simple, tool-free 3-minute setup process.
Key specs
- Filtration Stages:8-stage
- Installation Type:Under Sink
- Dimensions:16.8L x 12.9W x 4.3H
- Contaminants Removed:Chlorine, lead, heavy metals
- Maintenance Frequency:Up to 12 months
8.8

Very Good

Our Rating
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6

EXPRESS WATER
Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – Under Sink Water Plus 4 Filters – 50 GPD, 14 x 17 x 5, White
Main highlights

Exceptional Contaminant Reduction
Reduces up to 99.99% of lead, chlorine, fluoride, and more for pure, clean water.

Versatile Home Applications
Ideal for under-sink installation, providing clean water for drinking, cooking, and appliances.

Praised for Taste Improvement
Customers love the crisp, clean taste of water post-filtration.
Key specs
- Filtration Stages:Reverse Osmosis
- Installation Type:Under Sink
- Dimensions:14 x 5 x 15 inches
- Contaminants Removed:Lead, Chlorine, Fluoride
- Maintenance Frequency:N/A
8.6

Very Good

Our Rating

9.5
Flavor

9.3
Instruction

9.3
worth the money
7

Waterdrop
Waterdrop TSU 0.01 Micron Ultra Filtration Under Sink Water Filter System, 3-Stage Tankless Under Sink Water Filtration System with Faucet, Smart Panel, Not Lower TDS, Drilling Required
Main highlights

Advanced Ultrafiltration Membrane
Reduces harmful substances larger than 0.01 um, improving water safety.

Ideal for Mineral Retention
Perfect for homes needing mineral-rich water without TDS reduction.

Customer Praised Ease of Use
Installation and filter replacement are straightforward and user-friendly.
Key specs
- Filtration Stages:3 stages
- Installation Type:Under sink
- Dimensions:18.39 x 6.38 x 18.62 inches
- Contaminants Removed:Chlorine, taste, odor, metals
- Maintenance Frequency:24 months
8.4

Good

Our Rating

9.5
Easy installation

9.1
Flavor

8.4
worth the money
8

Culligan

Culligan US 3 EZ-Change Under-Sink Drinking Water Filtration System with Dedicated Faucet and Filter, Chrome

15% Off
8.1

Good

Our Rating
9

Waterdrop
Waterdrop TST-UF 0.01μm Ultra-Filtration Under Sink Water Filter System, Stainless Steel Water Filter for Sink, 5X Service Life Under Sink Water Filtration System, Removes 99% of Contaminants
Main highlights

Efficient Filtration System
Reduces bacteria, chlorine, heavy metals, and odors, enhancing water taste.

Versatile Installation Options
Ideal for homes avoiding drilling; can hang or floor place.

Easy Installation Praised
Customers love the straightforward setup and stainless steel durability.
8.0

Good

Our Rating

9.7
Easy installation

9.1
Instruction

8.9
Flavor
10

Aigerri

UV Reverse Osmosis Water Filter Countertop, 5-Stage RO Water Filtration System, 5:1 Pure to Drain, No Installation Required, Portable Water Purifier for Home Kitchen

37% Off
7.9

Good

Our Rating

10 Best under sink countertop filtrations of 2025

1

Waterdrop G2P600 Reverse Osmosis System, 600 GPD Tankless RO Water Filter System, Under Sink RO System, 7 Stage Filtration, 2:1 Pure to Drain, Reduce TDS, FCC Listed, USA Tech

9.5

9.5

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

Waterdrop WD-T3-C Reverse Osmosis Water Filter, NSF/ANSI 372 Certified, 8-Stage Under Sink RO Water Filter, 450GPD Tankless Water Filtration System, 2:1 Pure to Drain, BPA Free, Plug-in Required

3

Under Sink Water Filter for Sink Faucet by CuZn, 5 Year Filtration Life, Reduces PFAs, PFOS, Lead, Chlorine, Improves Taste of Tap Water with NSF/ANSI 42 & 372 Certified High Performance

9.9

9.9

9.7

4

Waterdrop TSA 8 Layer Under Sink Water Filter System, Under Sink Water Filtration System, Reduces PFAS, PFOA/PFOS, Fluoride, Chlorine, Bad Taste & Odor, NSF/ANSI 42 Certified Element, USA Tech

9.3

9.1

9.1

5

Waterdrop WD-TSA-UF 0.01 μm Ultra Filtration Under Sink Water Filter, Under Sink Water Filtration System 9 Stage Filtration, Reduces Chlorine, Taste and Odor, Fluoride, Advanced USA Tech

6

Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – Under Sink Water Plus 4 Filters – 50 GPD, 14 x 17 x 5, White

9.5

9.3

9.3

7

Waterdrop TSU 0.01 Micron Ultra Filtration Under Sink Water Filter System, 3-Stage Tankless Under Sink Water Filtration System with Faucet, Smart Panel, Not Lower TDS, Drilling Required

9.5

9.1

8.4

8

Culligan US 3 EZ-Change Under-Sink Drinking Water Filtration System with Dedicated Faucet and Filter, Chrome

9

Waterdrop TST-UF 0.01μm Ultra-Filtration Under Sink Water Filter System, Stainless Steel Water Filter for Sink, 5X Service Life Under Sink Water Filtration System, Removes 99% of Contaminants

9.7

9.1

8.9

10

UV Reverse Osmosis Water Filter Countertop, 5-Stage RO Water Filtration System, 5:1 Pure to Drain, No Installation Required, Portable Water Purifier for Home Kitchen

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