Best Alkaline Water Systems Updated May 2025
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Best Alkaline Water Systems
2025 Buyer's GuideUpdated May 2025
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Best Alkaline Water System

10.0

1

10.0

iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Und...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: 1,500 gallons
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.1" deep x 19.5" tall
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Picked by 310 people this week!
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Picked by 310 people this week!
Picked by 310 people this week!
Best Alkaline Water System

10.0

1
iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Und...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: 1,500 gallons
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.1" deep x 19.5" tall
Picked by 310 people this week!
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9.9

2

9.9

NU Aqua 7-Stage (12 Step Filtration) UV & Alkaline Under Sink Reverse Osmosis Water Filter System - 100 GPD RO Filtration & Rem...
Type: Under sink
Filtration Process: 7-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 100 gallons per day
Dimensions: 18" wide x 18" deep x 20" tall
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9.9

2
NU Aqua 7-Stage (12 Step Filtration) UV & Alkaline Under Sink Reverse Osmosis Water Filter System - 100 GPD RO Filtration & Rem...
Type: Under sink
Filtration Process: 7-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 100 gallons per day
Dimensions: 18" wide x 18" deep x 20" tall
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Premium Pick

9.8

3

9.8

Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under...
Type: Under sink
Filtration Process: 8-stage with reverse osmosis
Filter Lifespan: 2,200 gallons
Flow Rate: 0.42 gallons per minute
Dimensions: 5.7" wide x 18.1" deep x 17.7" tall
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Premium Pick

9.8

3
Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under...
Type: Under sink
Filtration Process: 8-stage with reverse osmosis
Filter Lifespan: 2,200 gallons
Flow Rate: 0.42 gallons per minute
Dimensions: 5.7" wide x 18.1" deep x 17.7" tall
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9.7

4

9.7

SimPure Q3-600 Tankless Reverse Osmosis System, Under Sink Water Filter System 600 GPD, 7 Stage Electric RO Water Filtration, R...
Type: Under sink
Filtration Process: 7-stage with reverse osmosis
Filter Lifespan: 1,056 gallons
Flow Rate: 600 gallons per day
Dimensions: 6" wide x 12.5" deep x 13.5" tall
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9.7

4
SimPure Q3-600 Tankless Reverse Osmosis System, Under Sink Water Filter System 600 GPD, 7 Stage Electric RO Water Filtration, R...
Type: Under sink
Filtration Process: 7-stage with reverse osmosis
Filter Lifespan: 1,056 gallons
Flow Rate: 600 gallons per day
Dimensions: 6" wide x 12.5" deep x 13.5" tall
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Best Value

9.5

5

9.5

Waterdrop TSU 0.01μm Ultra-Filtration Under Sink Water Filter System, 3-Stage Tankless Undersink Water Filtration with Faucet, ...
Type: Under sink
Filtration Process: 3-stage
Filter Lifespan: 2,200 gallons
Flow Rate: Not indicated
Dimensions: 4.7" wide x 14.8" deep x 14" tall
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Best Value

9.5

5
Waterdrop TSU 0.01μm Ultra-Filtration Under Sink Water Filter System, 3-Stage Tankless Undersink Water Filtration with Faucet, ...
Type: Under sink
Filtration Process: 3-stage
Filter Lifespan: 2,200 gallons
Flow Rate: Not indicated
Dimensions: 4.7" wide x 14.8" deep x 14" tall
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9.4

6

9.4

SimPure Alkaline UV Reverse Osmosis System T1-400ALK, NSF/ANSI 58 Certified, Tankless RO Water Filter System 400 GPD, pH+ Remin...
Type: Under sink
Filtration Process: 4-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 400 gallons per day
Dimensions: 9" wide x 16" deep x 18" tall
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9.4

6
SimPure Alkaline UV Reverse Osmosis System T1-400ALK, NSF/ANSI 58 Certified, Tankless RO Water Filter System 400 GPD, pH+ Remin...
Type: Under sink
Filtration Process: 4-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 400 gallons per day
Dimensions: 9" wide x 16" deep x 18" tall
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9.3

7

9.3

SimPure Y7T-BW-A Countertop Reverse Osmosis Water Filter, NSF/ANSI 58 Certified, 5 Stage RO Water Filtration System with Remine...
Type: Countertop
Filtration Process: 5-stage with reverse osmosis
Filter Lifespan: 528 gallons
Flow Rate: 100 gallons per day
Dimensions: 8" wide x 18" deep x 17" tall
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9.3

7
SimPure Y7T-BW-A Countertop Reverse Osmosis Water Filter, NSF/ANSI 58 Certified, 5 Stage RO Water Filtration System with Remine...
Type: Countertop
Filtration Process: 5-stage with reverse osmosis
Filter Lifespan: 528 gallons
Flow Rate: 100 gallons per day
Dimensions: 8" wide x 18" deep x 17" tall
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Popular

9.1

8

9.1

APEC Water Systems ROES-PH75 Essence Series Top Tier Alkaline Mineral pH+ 75 GPD 6-Stage Certified Ultra Safe Reverse Osmosis D...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 75 gallons per day
Dimensions: 5.2" wide x 16" deep x 18" tall
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Popular

9.1

8
APEC Water Systems ROES-PH75 Essence Series Top Tier Alkaline Mineral pH+ 75 GPD 6-Stage Certified Ultra Safe Reverse Osmosis D...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 75 gallons per day
Dimensions: 5.2" wide x 16" deep x 18" tall
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9.0

9

9.0

PIURIFY 50 Oz Hydrogen Water Pitcher - BPA Free Rich Hydrogen Water Generator Electrolysis Jug with SPE/PEM Technology. Hydroge...
Type: Countertop
Filtration Process: Single stage
Filter Lifespan: Not indicated
Flow Rate: N/A
Dimensions: 7.2" wide x 8.3" deep x 13" tall
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9.0

9
PIURIFY 50 Oz Hydrogen Water Pitcher - BPA Free Rich Hydrogen Water Generator Electrolysis Jug with SPE/PEM Technology. Hydroge...
Type: Countertop
Filtration Process: Single stage
Filter Lifespan: Not indicated
Flow Rate: N/A
Dimensions: 7.2" wide x 8.3" deep x 13" tall
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8.9

10

8.9

SimPure UV Tankless Reverse Osmosis System T1-400UV, NSF/ANSI 58 Certified, Under Sink RO Water Filter System 400 GPD, 8 Stage ...
Type: Under sink
Filtration Process: 8-stage with reverse osmosis
Filter Lifespan: 1,057 gallons
Flow Rate: 400 gallons per day
Dimensions: 9" wide x 16" deep x 18" tall
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8.9

10
SimPure UV Tankless Reverse Osmosis System T1-400UV, NSF/ANSI 58 Certified, Under Sink RO Water Filter System 400 GPD, 8 Stage ...
Type: Under sink
Filtration Process: 8-stage with reverse osmosis
Filter Lifespan: 1,057 gallons
Flow Rate: 400 gallons per day
Dimensions: 9" wide x 16" deep x 18" tall
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We also considered 10 others:

Our Top Choice

Best Alkaline Water System

10.0

1

10.0

iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Und...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: 1,500 gallons
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.1" deep x 19.5" tall
Read Full Review
Save 14%
Compare
Picked by 310 people this week!
Save 14%
Compare
Picked by 310 people this week!
Picked by 310 people this week!
Best Alkaline Water System

10.0

1
iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Und...
Type: Under sink
Filtration Process: 6-stage with reverse osmosis
Filter Lifespan: 1,500 gallons
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.1" deep x 19.5" tall
Picked by 310 people this week!
Save 14%
Compare
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Compare Features

Filtration Process
Best Alkaline Water System
1. iSpring RCC7AK RO Water Filtration System
ISPRING Preview ISPRING Preview
ISPRING
at Amazon
2. NU Aqua Platinum Series 7 RO System
NU AQUA Preview NU AQUA Preview
NU AQUA
at Amazon
Premium Pick
3. Waterdrop G3 Reverse Osmosis Water Filtration System
WATERDROP Preview WATERDROP Preview
WATERDROP
at Amazon
4. SimPure Q3-600 Tankless Reverse Osmosis System
SIMPURE Preview SIMPURE Preview
SIMPURE
at Amazon
Best Value
5. Waterdrop WD-TSU Under Sink Water Filter System
WATERDROP Preview WATERDROP Preview
WATERDROP
at Amazon
6. SimPure T1-400UV Water Filtration System
SIMPURE Preview SIMPURE Preview
SIMPURE
at Amazon
7. SimPure Y7T-BW-A Countertop RO Water Filter
SIMPURE Preview SIMPURE Preview
SIMPURE
at Amazon
Popular
8. APEC Essence Series Water System
APEC WATER Preview APEC WATER Preview
APEC WATER
at Amazon
9. Piurify Hydrogen Alkaline Water Pitcher
PIURIFY Preview PIURIFY Preview
PIURIFY
at Amazon
10. SimPure T1-400UV RO Water Filtration System
SIMPURE Preview SIMPURE Preview
SIMPURE
at Amazon
Deal
Save 14% Save 21% Save 20% Save 38% + 10% Code BUYERSGIDEQ Save 26% Save 26% Save 28% Save 15% + $40 Coupon Save 24% + $20 Coupon Save 32%
Deal Save 14% Save 21% Save 20% Save 38% + 10% Code BUYERSGIDEQ Save 26% Save 26% Save 28% Save 15% + $40 Coupon Save 24% + $20 Coupon Save 32%
Type
Under sink Under sink Under sink Under sink Under sink Under sink Countertop Under sink Countertop Under sink
Type 		Under sink Under sink Under sink Under sink Under sink Under sink Countertop Under sink Countertop Under sink
Filtration Process
6-stage with reverse osmosis 7-stage with reverse osmosis 8-stage with reverse osmosis 7-stage with reverse osmosis 3-stage 4-stage with reverse osmosis 5-stage with reverse osmosis 6-stage with reverse osmosis Single stage 8-stage with reverse osmosis
Filtration Process 		6-stage with reverse osmosis 7-stage with reverse osmosis 8-stage with reverse osmosis 7-stage with reverse osmosis 3-stage 4-stage with reverse osmosis 5-stage with reverse osmosis 6-stage with reverse osmosis Single stage 8-stage with reverse osmosis
Filter Lifespan
1,500 gallons Not indicated 2,200 gallons 1,056 gallons 2,200 gallons Not indicated 528 gallons Not indicated Not indicated 1,057 gallons
Filter Lifespan 		1,500 gallons Not indicated 2,200 gallons 1,056 gallons 2,200 gallons Not indicated 528 gallons Not indicated Not indicated 1,057 gallons
Flow Rate
75 gallons per day 100 gallons per day 0.42 gallons per minute 600 gallons per day Not indicated 400 gallons per day 100 gallons per day 75 gallons per day N/A 400 gallons per day
Flow Rate 		75 gallons per day 100 gallons per day 0.42 gallons per minute 600 gallons per day Not indicated 400 gallons per day 100 gallons per day 75 gallons per day N/A 400 gallons per day
Dimensions
15.5" wide x 5.1" deep x 19.5" tall 18" wide x 18" deep x 20" tall 5.7" wide x 18.1" deep x 17.7" tall 6" wide x 12.5" deep x 13.5" tall 4.7" wide x 14.8" deep x 14" tall 9" wide x 16" deep x 18" tall 8" wide x 18" deep x 17" tall 5.2" wide x 16" deep x 18" tall 7.2" wide x 8.3" deep x 13" tall 9" wide x 16" deep x 18" tall
Dimensions 		15.5" wide x 5.1" deep x 19.5" tall 18" wide x 18" deep x 20" tall 5.7" wide x 18.1" deep x 17.7" tall 6" wide x 12.5" deep x 13.5" tall 4.7" wide x 14.8" deep x 14" tall 9" wide x 16" deep x 18" tall 8" wide x 18" deep x 17" tall 5.2" wide x 16" deep x 18" tall 7.2" wide x 8.3" deep x 13" tall 9" wide x 16" deep x 18" tall

Related Categories
Alkaline Water MachineAlkaline Water Filtration SystemReverse Osmosis Water PurifierReverse Osmosis SystemReverse Osmosis Drinking Water SystemWater Filtration System (All)
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Related Categories
Alkaline Water MachineAlkaline Water Filtration SystemReverse Osmosis Water PurifierReverse Osmosis SystemReverse Osmosis Drinking Water SystemWater Filtration System (All)
Related Categories
Alkaline Water MachineAlkaline Water Filtration SystemReverse Osmosis Water PurifierReverse Osmosis SystemReverse Osmosis Drinking Water SystemWater Filtration System (All)