Compare Water Filters
See what each filter is made to do, where it fits, what it costs and what you need to maintain it.
Compare before you buy
Buyer-Fit Comparison
Pick two or three assessed models with the same job. Compare the tradeoffs, evidence, upkeep and budget—not just the box price. Eight products are available in this first release.
0/3 selected. Choose at least two in one group.
● Product ProfileiSpring WSP 50-Micron Spin-Down Sediment Prefilter
Reusable coarse screen for sand and rust before finer filtration.
● Product ProfileiSpring RCC7P-AK Pumped Alkaline RO
75 GPD tank-style RO with an electric booster pump and mineral finishing stage.
ASIN: B0987FCQQW● Product ProfileWaterdrop G3P800 Tankless Reverse Osmosis
800 GPD tankless RO with a smart TDS faucet and a manufacturer-listed 3:1 pure-to-drain ratio.
ASIN: B083DFW1QS● Product ProfileFrizzlife PD600-TAM3 Tankless RO
600 GPD tankless RO paired with the TAM3 remineralization stage; Frizzlife lists a 2:1 pure-to-drain ratio.
ASIN: B00I0ZGOZM● Product ProfileAPEC Essence ROES-50
Non-electric five-stage tank-style reverse osmosis rated for 50 GPD at 60 psi.
ASIN: B005LJ8EXU● Product ProfileiSpring RCC7AK 6-Stage Alkaline RO
75 GPD tank-style RO with a post-RO alkaline remineralization stage.
ASIN: B0B7ZSYMR4● Product ProfileAquaTru Classic Alkaline Countertop RO
Countertop four-stage RO configuration with an alkaline VOC filter and no plumbing connection.
ASIN: B0C4N497MV● Product ProfileWaterdrop A1 Countertop Hot and Cold RO
100 GPD countertop RO dispenser with adjustable hot and cold water and a manufacturer-listed 2:1 pure-to-drain ratio.
ASIN: B088GSC89B● Product ProfileAquasana Claryum Direct Connect AQ-MF-1
Direct-connect under-sink filter rated for 784 gallons and 1.5 GPM through the existing faucet.
ASIN: B085FYVTS7● Product ProfileWaterdrop 17UB-UF Under-Sink Ultrafiltration System
0.01-micron 17UB-UF under-sink system with a dedicated faucet and a three-year manufacturer-rated filter life.
ASIN: B009AEJWZG● Product ProfileiSpring CU-A4 4-Stage Ultrafiltration System
Four-stage, 0.01-micron under-sink ultrafiltration system with no RO drain stream.
ASIN: B0DFC22BHT● Product ProfileClearly Filtered P-V3 10-Cup Water Pitcher
80-ounce pitcher certified to NSF/ANSI 42 and 372, with additional model-specific laboratory reduction reports published by the manufacturer.
ASIN: B0B3BM3Z94● Product ProfileBrita 10-Cup Pitcher with Elite Filter
10-cup pitcher configuration using Brita's 120-gallon Elite replacement filter.
ASIN: B0073PZ6O0● Product ProfileZeroWater 10-Cup 5-Stage Pitcher
Five-stage ion-exchange pitcher supplied with a TDS meter; filter life depends strongly on incoming TDS.
ASIN: B008GNRMYK● Product ProfileiSpring WGB32B 3-Stage Whole-House Filter
Base WGB32B with one sediment cartridge and two carbon-block cartridges in 20 × 4.5-inch housings.
ASIN: B01FI3BLYM● Product ProfileiSpring WGB32BM Iron and Manganese Filter
Three-stage whole-house cartridge system for tested iron up to 3 ppm and manganese up to 1 ppm.
ASIN: B00MYEV6VC● Product ProfileDuraWater 48,000-Grain Softener with Fleck 5600SXT Valve
Third-party 48,000-grain softener bundle using Pentair's metered Fleck 5600SXT control valve.
ASIN: B0744TC3PW● Product ProfileiSpring ED2000 Electronic Descaler
Clamp-on electronic scale-management device; it does not remove hardness minerals or produce softened water.
ASIN: B00XB36W0A● Product ProfileVIQUA VH200 Whole-Home UV System
35-watt ultraviolet treatment system sold as VH200; this page does not apply VH200-V Class B certification to the base VH200.
ASIN: B0BM4CX6F2● Product ProfileJolie Filtered Showerhead
Filtered showerhead whose maker reports more than 84% free-chlorine reduction across the stated filter life.
ASIN: B01MUBU0YC● Product ProfileAquaBliss SF100 Shower Filter
Universal inline shower filter using a replaceable multi-stage SFC100 cartridge.
ASIN: B0C7GDB77V● Product ProfileWaterdrop X16 Alkaline Tankless Reverse Osmosis
Premium 1,600 GPD tankless RO with mineral addition, UV-C, a smart faucet and a listed 3:1 pure-to-drain ratio.
ASIN: B0DWVLNTSV● Product ProfileAquasana SmartFlow RO AQ-SFRO2-BN
No-power tank-style RO with a mineral stage and WQA-certified claims across NSF/ANSI 42, 53, 58 and 401.
ASIN: B00XAJJVHQ● Product ProfileAquasana Rhino EQ-1000 Whole-House Filter
Premium whole-house carbon and KDF system with a 1,000,000-gallon capacity claim and a 7 GPM tested rated flow.
● Product ProfileSpringWell SCN1-6 Calcite pH Neutralizer
Backwashing calcite tank for tested private-well water in the maker's 6.0 to 6.5 pH range.
● Product ProfileSpringWell CF Whole House Water Filter
Long-life whole-house media system for treated city water, offered in 9, 12, and 20 GPM sizes on the current product page.
● Product ProfileSpringWell FutureSoft Salt-Free Water Conditioner
Salt-free scale conditioner for water that meets the maker's chemistry limits; it does not remove hardness minerals.
● Product ProfileSpringWell WS Whole House Well Water Filter
Air-injection oxidation system for tested private-well iron, sulfur odor, and manganese problems.
● Product ProfileSpringWell Whole House Lead & Cyst Removal System
0.5-micron whole-house cartridge system for the maker's listed lead, cyst, disinfectant, and VOC claims.
● Product ProfileSpringWell Salt-Based Water Softener
Metered ion-exchange softener in 32,000-, 48,000-, and 80,000-grain sizes for true hardness removal.
● Product ProfileSpringWell BlackComb Whole House UV System
15 GPM ultraviolet system for homes whose tested water meets the maker's pretreatment limits.
● Product ProfileSpringWell Whole Home PFAS Water Filter
Dedicated 7 GPM whole-home PFAS media system with a manufacturer-listed 350,000-gallon capacity.
● Product ProfileSpringWell Whole House Filter + FutureSoft Combo
City-water whole-house filter paired with salt-free scale conditioning; it reduces listed chemicals but does not make soft water.
● Product ProfileSpringWell Well Filter + Salt-Based Softener Combo
Backwashing well-water filter for iron, sulfur, and manganese paired with true ion-exchange softening.
● Product ProfileMoen Four-Stage Reverse Osmosis System
Four-stage under-sink tank reverse osmosis sold by SpringWell; the drinking-water faucet is purchased separately.