10 bestReverse Osmosis Water Filtersof October 2026
112M consumers helped this year.
1
iSpring RCC7, NSF Certified, High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System and Ultimate Water Softener, 75 GPD, Brushed Nickel Faucet
iSpring
9.7
2
Home Master TMAFC-ERP-L Artesian Full Contact with Permeate Pump Loaded Undersink Reverse Osmosis Water Filter System
Home Master
9.4
5% off
3
Express Water – 3 Year Reverse Osmosis System Replacement Filter Set – 23 Filters with 50 GPD RO Membrane, Carbon GAC, ACB, PAC Filters, Sediment SED Filters – 10 inch Size Water Filters
Express Water
9.1
7% off
4
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 15 x 5, White
Express Water
8.8
16% off
5
Aquaboon 25-Pack of 5 Micron 10" Sediment Water Filter Replacement Cartridge for Any Standard RO Unit | Whole House Sediment Filtration | Compatible with Dupont WFPFC5002, Pentek DGD Series, RFC
Aquaboon
8.5
OtherUp to 5% off
Aquasana SmartFlow™ Reverse Osmosis Water Filter Stage 1 and Stage 3 Replacement Carbon and Advanced Claryum Filters Last 6 Months - Not Compatible with OptimH2O - Replacements only
Express Water – 50 Pack Sediment Water Filter Replacement – 1 Micron, High Capacity – 10 inch – Under Sink and Reverse Osmosis System
Aquasana SmartFlow™ Reverse Osmosis Water Filter Stage 2 Reverse Osmosis Membrane Replacement Lasts 1 Year - Not Compatible with OptimH2O - Replacement only
Express Water - FLTMEME50 – Reverse Osmosis Membrane – RO Membrane 50 GPD Water Filter Replacement – Under Sink and Reverse Osmosis System
11% off
6
Express Water Incorporated FLTSETC6S6G6I3M50 Reverse Osmosis 22 Water Filter Replacement Set
Express Water
8.2
5% off
7
Express Water – 6 Month Reverse Osmosis System Replacement Filter Set – 5 Filters with 50 GPD RO Membrane – 10 inch Size Water Filters
Express Water
7.9
8
Home Master TM Standard Under Sink Reverse Osmosis Water Filter System
Home Master
7.6
19% off
9
Whirlpool WHEERM Reverse Osmosis Replacement Membrane — Compatible with WHAPSRO, WHAROS5 & WHER25 Filtration Systems | Reduces Metals for Contaminant-Free, Great Tasting Water | 1-2 Year Lifespan
Whirlpool
7.3
10
Express Water – 1 Year Alkaline Reverse Osmosis System Replacement Filter Set – 10 Filters with 50 GPD RO Membrane – 10 inch Size Water Filters
Express Water
7.0
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