#1 Home Improvement Retailer

Cart

Cart

Home
Plumbing
Water Filters
Under Sink Water Filters

Best Rated Under Sink Water Filters

Shop products with the best ratings based on our customer reviews
174 Results

    Sort by

    Top Sellers

Best Seller

G3P600 8-Stage NSF Certified Reverse Osmosis Water Filtration System, Under-Sink Water Filter, Extra CF FilterG3P600 8-Stage NSF Certified Reverse Osmosis Water Filtration System, Under-Sink Water Filter, Extra CF Filter
(4.8 / 270)
Model# B-WD-G3P600-CFSET
$466.99
Was $627.99
Save $161.00 (26%)
G3P800 Reverse Osmosis System,800 GPD,NSF/ANSI 42, 58, 372 Certified,3:1 Pure to Drain,Tankless,1 Extra CF FilterG3P800 Reverse Osmosis System,800 GPD,NSF/ANSI 42, 58, 372 Certified,3:1 Pure to Drain,Tankless,1 Extra CF Filter
(4.9 / 173)
Model# B-WD-G3P800-CFSET
$876.99
Was $1,027.99
Save $151.00 (15%)
NSF-Certified 6-Stage Reverse Osmosis System w/ Alkaline Remineralization, Reduces PFAS, Fluoride, Chromium, Lead, TDSNSF-Certified 6-Stage Reverse Osmosis System w/ Alkaline Remineralization, Reduces PFAS, Fluoride, Chromium, Lead, TDS
(4.8 / 996)
Model# RCC7AK
$234.99
G3P600 Reverse Osmosis System, 8-Stage Tankless, 600 GPD, Smart LED Faucet Extra Remineralization Independent FilterG3P600 Reverse Osmosis System, 8-Stage Tankless, 600 GPD, Smart LED Faucet Extra Remineralization Independent Filter
(4.8 / 217)
Model# B-WD-G3P6-MNRST
$466.99
Was $568.99
Save $102.00 (18%)
G3P800 Reverse Osmosis System, NSF/ANSI 53 58 and 372 Certified, LED Purifier, Extra Remineralization Independent FilterG3P800 Reverse Osmosis System, NSF/ANSI 53 58 and 372 Certified, LED Purifier, Extra Remineralization Independent Filter
(4.9 / 158)
Model# B-WD-G3P8-MNRST
$876.99
Was $1,026.99
Save $150.00 (15%)
G3P800 Reverse Osmosis System, Tankless Under Sink with LED Purifier,Extra N1CF and Remineralization Independent FiltersG3P800 Reverse Osmosis System, Tankless Under Sink with LED Purifier,Extra N1CF and Remineralization Independent Filters
(4.9 / 146)
Model# B-WD-G3P8-MNR1Y
$906.98
Was $1,056.98
Save $150.00 (14%)
Reverse Osmosis 5 Stage Water Filtration System - NSF Certified - Faucet, Tank and 4 Filters - 50 GPD
(4.8 / 427)
Model# RO5DX
$189.99
X16 Tankless RO System,NSF/ANSI 58&372 Certified,11-Stage Filtration,Includes 3 WD-F2 & 1 WD-F1A Filters,2-Year SupplyX16 Tankless RO System,NSF/ANSI 58&372 Certified,11-Stage Filtration,Includes 3 WD-F2 & 1 WD-F1A Filters,2-Year Supply
(4.9 / 147)
Model# B-WD-X16-3F2F1
$1,722.96
Was $2,122.96
Save $400.00 (19%)
X12 Alkaline pH+RO System, NSF/ANSI 58 and 372 Certified, 11-Stage, Includes 3 WD-F2 and 1 WD-F1A Filters, 2-Year SupplyX12 Alkaline pH+RO System, NSF/ANSI 58 and 372 Certified, 11-Stage, Includes 3 WD-F2 and 1 WD-F1A Filters, 2-Year Supply
(4.8 / 256)
Model# B-WD-X12-3F2F1
$1,222.96
Was $1,422.96
Save $200.00 (14%)
Maximum Performance Under Sink Reverse Osmosis Water Filtration System with Booster Pump and Alkaline FilterMaximum Performance Under Sink Reverse Osmosis Water Filtration System with Booster Pump and Alkaline Filter
(4.9 / 188)
Model# RCC7P-AK
$327.58
X12 Alkaline Mineral pH+ Reverse Osmosis System, NSF/ANSI 58, 372 Certified,11-Stage,3:1 Pure, Includes Extra F2 FilterX12 Alkaline Mineral pH+ Reverse Osmosis System, NSF/ANSI 58, 372 Certified,11-Stage,3:1 Pure, Includes Extra F2 Filter
(4.9 / 246)
Model# B-WD-X12-F2
$1,127.99
Was $1,327.99
Save $200.00 (15%)
Ultimate Premium Quality WQA Certified 90 GPD Under-Sink Reverse Osmosis Drinking Water Filter System
(4.8 / 606)
Model# RO-90
$229.95