Best Home Water Purifiers
Updated May 2025
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Best Home Water Purifiers
2025 Buyer's GuideUpdated May 2025
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1
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
1
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
2
2
ZeroWater 22-Cup Ready-Read 5-Stage Water Filter Dispenser with Instant Read Out - 0 TDS for Improved Tap Water Taste - IAPMO C...
Type: Countertop
Filtration Process: 5-stage
Filter Lifespan: 25 gallons
Flow Rate: Not indicated
Dimensions: 5.5" wide x 10.4" deep x 11" tall
3
iSpring RCC7, NSF Certified, High Capacity Under Sink 5-Stage Reverse Osmosis Water Filter, RO Drinking System, 75 GPD, Brushed...
Type: Under sink
Filtration Process: 5-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.3" deep x 17.5" tall
3
iSpring RCC7, NSF Certified, High Capacity Under Sink 5-Stage Reverse Osmosis Water Filter, RO Drinking System, 75 GPD, Brushed...
Type: Under sink
Filtration Process: 5-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 75 gallons per day
Dimensions: 15.5" wide x 5.3" deep x 17.5" tall
4
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
4
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
5
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
5
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
6
SimPure Y7P-BW UV Countertop Reverse Osmosis Water Filter, NSF/ANSI 58 Certified, 5 Stage RO Water Filtration System, Water Pur...
Type: Countertop
Filtration Process: 4-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 418 gallons per day
Dimensions: 10" wide x 19" deep x 19" tall
6
SimPure Y7P-BW UV Countertop Reverse Osmosis Water Filter, NSF/ANSI 58 Certified, 5 Stage RO Water Filtration System, Water Pur...
Type: Countertop
Filtration Process: 4-stage with reverse osmosis
Filter Lifespan: Not indicated
Flow Rate: 418 gallons per day
Dimensions: 10" wide x 19" deep x 19" tall
7
7
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
8
8
Waterdrop 10UA Under Sink Water Filter System, Reduces PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste & Odor, Under Counter Water F...
Type: Under sink
Filtration Process: Single stage
Filter Lifespan: 8,000 gallons
Flow Rate: 2.5 gallons per minute
Dimensions: 3.6" wide x 3.9" deep x 12.3" tall
9
9
Waterdrop Water Filter Pitcher with 1 Filter, 200-Gallon Long-Life, 10-Cup Large Water Filter Pitcher, NSF Certified, 5X Times ...
Type: Countertop
Filtration Process: 7-stage
Filter Lifespan: 200 gallons
Flow Rate: Not indicated
Dimensions: 10" wide x 5.28" deep x 10.04" tall
10
10
Waterdrop Whole House Water Filter System, Reduce Iron & Manganese, with Carbon and Sediment Filters, 5-Stage Filtration, Reduc...
Type: Whole-house
Filtration Process: 5-stage
Filter Lifespan: Not indicated
Flow Rate: Up to 15 gallons per minute
Dimensions: 14.4" wide x 7.5" deep x 15.6" tall
We also considered 10 others:
Our Top Choice
1
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
1
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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