They originally came in a box of six (Three 2 packs), and we used one filter… The second filter that comes in the WHEERF pack of Whirlpool WHER25 replacement filters is the activated carbon post-filter. Whirlpool WHEERM Reverse Osmosis Replacement Membrane|Fits WHAPSRO, WHAROS5 & WHER25 Filtration Systems|Easy To Replace UltraEase Filter Cartridges |Extra Long Life | 1 Filter, Whirlpool WHEERF Replacement Water Filter Cartridges, Whirlpool WHEERM Reverse Osmosis Replacement Membrane & WHER25 Filtration Systems, 1 Filter & WHEEDF Dual Stage Replacement Pre/Post Water Filters, 1 Set, Pack of 2, Grey, Whirlpool WHEMBF Purifier Water Fits WHAMBS5 & WHEMB40 Filtration Systems | Extra Long Life | Easy to Replace UltraEase Filter Cartridges | 1 Set, Single Unit, White, 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, Whirlpool WHEEDF Dual Stage Replacement Pre/Post Water Filters | Fits WHADUS5 & WHED20 Filtration Systems | 1 Set, Pack of 2, Grey, EcoPure ECOROM Reverse Osmosis Under Sink Replacement Water Membrane | NSF Certified | Fits Ecop30 System | 1-3-Year Filter Life, 0.9, APEC Water Systems FILTER-SET-ES High Capacity Replacement Pre-Filter Set For Essence Series Reverse Osmosis Water Filter System Stage 1-3, EcoPure Reverse Osmosis Under Sink Replacement Water Filter Set (ECOROF) | NSF Certified | Fits ECOP30 System | 6-Month Filter Life,2, EcoPure Purifier Under Sink Replacement Water Set (ECOWPF) | NSF Certified | Fits ECOP40 System | 6-Month Filter Life, White, APPLED MEMBRANES Reverse Osmosis Membrane and Filter Replacement, 50 GPD Membrane with Pre and Post Filter, Complete RO Filter Set and Membrane for 5-Stage Water Filtration Systems, Amz_WWhirlpool WHEERF Reverse Osmosis Replacement Pre/Post Water Filters (Fits Systems WHAROS5, WHAPSRO & WHER25), APEC FILTER-SET US MADE Double Capacity Replacement Pre-Filter Set For ULTIMATE Series Reverse Osmosis Water Filter System Stage 1, 2&3, EcoPure Dual Stage Under Sink Replacement Water Set (ECODWF) | NSF Certified | Fits ECOP20 System | 6-Month Filter Life, Watts Premier WP531152 RO Pure 4 Pack Replacement Filters, SimPure Reverse Osmosis Filter Replacement, Universal RO Filters Replacement Compatible 5-Stage Reverse Osmosis Water Filtration Systems, Standard 10 inch Water Filters, 5-Pack, 2Pack Outdoor Cycling Protective Cover, 5-layer Replacement Filter for Sports Outdoor Activities, Cycling, Motorcycle, Running（2 Protective Covers +10 Filters+8 Valves）, Whirlpool WHELJ1 Central Water Filtration System, White, Reverse Osmosis Replacement Water Filter Cartridge Compatible with GE GXRM10RBL PNRV12 GXRV10 RO systems, Membrane Solutions 2x Carbon Filter & RO Membrane 50GPD Combo Set for FX12M FX12P, iSpring F7-GAC for Standard 5-Stage Reverse Osmosis RO Systems 1-Year Replacement Supply Filter Cartridge Pack Set, Hydro Life 52412 C-2063 Replacement Cartridge, GE FX12P Reverse Osmosis Replacement Filter Set, Reverse Osmosis Filter Replacement, Membrane Solutions 75 GPD Complete Replacement Filter Set For Under Sink 5-Stage Reverse Osmosis Replacement Water Filter System, Reverse Osmosis Filter Replacement, Membrane Solutions 50 GPD Complete Replacement Filter Set For Under Sink 5-Stage Reverse Osmosis Replacement Water Filter System, Aquatic Life RO Buddie Filter Cartridge Value Pack, 50-GPD Membrane Plus Sediment Pre-Filter & Carbon Block Replacement Filter Cartridges (TFC, S, C), Hydrotech 41400008/41400009 Replacement Reverse Osmosis Water Filter Cartridge Set, Reverse Osmosis Filter Replacement, Membrane Solutions 50GPD Complete Replacement Filter Set For Under Sink 5-Stage Reverse Osmosis Replacement Water Filter System, CFS COMPLETE FILTRATION SERVICES EST.2006 Compatible for GE FX12P FX12M Compatible Filter Combo Set for GXRM10RBL RO System, 2-Pack Replacement for PurePro G-107RA Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with PurePro G-Series 7 Stage RO System - Denali Pure Brand, AP Reverse Osmosis Water Filter Replacements for SQC3, Water Factory Filters 47-55706G2 & 47-55710G2, Replacement Filter 2 Cartridge Set, Replacement for MaxWater 101112 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with MaxWater 5 Stage 50 GPD Full Functions LCD Reverse Osmosis System - Denali Pure, Replacement for PurePro G-107RA Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with PurePro G-Series 7 Stage RO System - Denali Pure Brand, IPW Industries Inc Replacement Filter Kit Compatible with Krystal Pure KR10 RO System - Includes Carbon Block Filters & Polypropylene Sediment Filter, Aquaboon 1 Year RO Units Replacement Filter Kit 5 Pack Carbon+Sediment+Inline, 20-Pack Replacement for AMI AAA-125 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with AMI AAA Series 5 Stage Home Reverse Osmosis System - Denali Pure Brand, 25-Pack Replacement for Crystal Quest CQE-RO-00102 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with Crystal Quest Thunder 2000M RO+UF System - Denali Pure Brand, 25-Pack Replacement for H2O Distributors H2O-UCF-01 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with H2O Distributors Single Stage Under Sink System, 25-Pack Replacement for Topway Global (TGI) GTS-550P Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with TGI GTS-550P Five Stage RO System - Denali Pure Brand, 20-Pack Replacement for Topway Global (TGI) GTS-550P Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with TGI GTS-550P Five Stage RO System - Denali Pure Brand, 20-Pack Replacement for Crystal Quest CQE-RO-00102 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with Crystal Quest Thunder 2000M RO+UF System - Denali Pure Brand, 20-Pack Replacement for H2O Distributors H2O-UCF-01 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with H2O Distributors Single Stage Under Sink System, 9-Pack Replacement for Crystal Quest CQE-RO-00102 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with Crystal Quest Thunder 2000M RO+UF System - Denali Pure Brand, 8-Pack Replacement for Topway Global (TGI) GTS-550P Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with TGI GTS-550P Five Stage RO System - Denali Pure Brand, 10-Pack Replacement for H2O Distributors H2O-UCF-01 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with H2O Distributors Single Stage Under Sink System, 5-Pack Replacement for H2O Distributors H2O-UCF-01 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with H2O Distributors Single Stage Under Sink System - Denali Pure, 12-Pack Replacement for Crystal Quest CQE-RO-00102 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with Crystal Quest Thunder 2000M RO+UF System - Denali Pure Brand, 10-Pack Replacement for Topway Global (TGI) GTS-550P Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with TGI GTS-550P Five Stage RO System - Denali Pure Brand, 16-Pack Replacement for H2O Distributors H2O-UCF-01 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with H2O Distributors Single Stage Under Sink System, 6-Pack Replacement for Crystal Quest CQE-RO-00102 Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with Crystal Quest Thunder 2000M RO+UF System - Denali Pure Brand, 5-Pack Replacement for Topway Global (TGI) GTS-550P Polypropylene Sediment Filter - Universal 10-inch 5-Micron Cartridge Compatible with TGI GTS-550P Five Stage RO System - Denali Pure Brand, Whirlpool WHEURF Replacement Water NSF Certified .5 Micron Rating | Fits Wheuff Filtration Easy, No Mess Filter Change System, White, Franke USA FRX02 Water filter cartridge, Single, White. As the name implies, the post-filters in a reverse osmosis water system … Genuine OE parts, made in the USA, the WHEERF Whirlpool replacement water filters are built to ensure your WHER25 reverse osmosis filtration system continues to provide you with the highest quality water. A membrane can last from 1-3 years, … When it’s time for a Whirlpool ® refrigerator water filter replacement, everydrop ® filters are the only filter approved by Whirlpool. It is essential to change your filters every 6 months to ensure your system is working properly. Find many great new & used options and get the best deals for Whirlpool WHEERM Reverse Osmosis Replacement Membrane at the best online prices at eBay! To comply with the new e-Privacy directive, you agree to the privacy policy and our use of cookies. Pack includes both the UltraEase pre-filter and post-filter, which have been tested and certified against NSF/ANSI Standard 42 & 58. 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