Under-sink RO
Waterdrop · Model G3P800
Waterdrop G3P800
A high-capacity 800 GPD tankless reverse osmosis system for busy home kitchens.
800 GPD7 stages3:1
$799last known
System details
REVERSE OSMOSIS SYSTEMS · WATER FILTERS · USA & CANADA
Choose an RO system for your water.
We compared hundreds of water filters and systems. These 17 made the shortlist. Compare under-sink and countertop reverse osmosis systems, mineralizers and shower filters. Start by checking your water.
Countertop RO
Waterdrop · Model M6HG
Waterdrop M6HG
A countertop reverse osmosis system with hot water and mineralization.
countertophot water8 stages
$359last known
System details
Under-sink RO
Frizzlife · Model PD1200
Frizzlife PD1200
A 1,200 GPD tankless reverse osmosis system for high filtered-water demand.
1200 GPD11 stages3:1
$650last known
System details
Under-sink RO
Waterdrop · Model G3P600
Waterdrop G3P600
A compact 600 GPD tankless reverse osmosis system for everyday under-sink filtration.
600 GPD8 stages2:1
$449last known
System details
Countertop RO
Waterdrop · Model M6CG
Waterdrop M6CG
A countertop RO dispenser with cold, room-temperature and hot water plus mineralization.
3 temperaturescountertop8 stages
$459last known
System details
Under-sink RO
Frizzlife · Model PD800-TAM4
Frizzlife PD800-TAM4
An 800 GPD under-sink RO system paired with a TAM4 mineralizer.
800 GPD9 stagesTAM4
$510last known
System details
Under-sink RO
Waterdrop · Model G5P700A
Waterdrop G5P700A
A 700 GPD alkaline reverse osmosis system with built-in mineralization.
700 GPD8 stagesmineral stage
$309last known
System details
Under-sink RO
Waterdrop · Model G5P500A
Waterdrop G5P500A
A compact 500 GPD RO system with mineralization and a simple mechanical faucet.
500 GPD8 stagesmineral stage
$259last known
System details
RO mineralizer
Frizzlife · Model TAM4
Frizzlife TAM4 Mineralizer
A final-stage mineralizer for compatible RO systems using 1/4-inch tubing.
1/4 inchafter ROmineral stage
$100last known
System details
RO mineralizer
Frizzlife · Model TAM3
Frizzlife TAM3 Mineralizer
An inline mineralizer installed after a compatible reverse osmosis membrane.
1/4 inchafter ROmineral stage
$40last known
System details
Under-sink RO
Frizzlife · Model PD1000-TAM4
Frizzlife PD1000-TAM4
A 1,000 GPD reverse osmosis system paired with a TAM4 mineralizer.
1000 GPD9 stagesTAM4
$600last known
System details
Countertop RO
Waterdrop · Model M6H
Waterdrop M6H
A countertop RO system with hot-water dispensing and no permanent plumbing.
countertophot water7 stages
$339last known
System details
Under-sink RO
Frizzlife · Model PD600-TAM3
Frizzlife PD600-TAM3
A compact 600 GPD reverse osmosis system paired with a TAM3 mineralizer.
600 GPD7 stages2:1
$380last known
System details
Shower filter
MyHalos · All-in-one showerhead + filter
MyHalos Shower Head
A shower head with a replaceable filter for utility water.
3 stagesshowerreplaceable cartridge
$80last known
System details
Shower filter
AquaBliss · Model SF100
AquaBliss SF100
An inline shower filter installed between the shower arm and shower head.
12 stagesshowerSF100 cartridge
$35last known
System details
Under-sink RO
Waterdrop · Model X12
Waterdrop X12
A 1,200 GPD under-sink RO system with a final mineralization stage and high flow.
1200 GPD11 stagesmineral stage
$1,099last known
System details
Under-sink RO
Waterdrop · Model X16-BAS
Waterdrop X16-BAS
A 1,600 GPD tankless reverse osmosis system with mineralization and very high flow.
1600 GPD11 stagesmineral stage
$1,599last known
System details
No products match this filter.
How to choose an RO filter?
Start with water data
Start with a utility report or a laboratory water test. Choose treatment for contaminants that are actually present.
Verify the exact model
NSF/ANSI 58 covers reverse osmosis systems, but certification does not automatically include every contaminant. Verify the exact model and reduction claims.
Calculate operating cost
Compare replacement filters, service, installation and reject-water use. Water-efficient RO systems reduce waste.
RO SYSTEM QUESTIONS
Clear and concise.
Find more answers in our reverse osmosis FAQ.
How do I choose a reverse osmosis system for my home?
Check the local utility report or test your water. Then compare exact contaminant claims, model certification, rated GPD, reject-water use, replacement filters and installation.
Under-sink or countertop reverse osmosis?
An under-sink system saves counter space and usually provides more flow, but needs water and drain connections. A countertop system avoids drilling and suits rentals or offices.
What does 600, 800 or 1,200 GPD mean?
GPD means gallons per day under test conditions. Higher ratings usually mean faster flow, while actual output depends on pressure, temperature and feed-water quality.
What does NSF/ANSI 58 certification mean?
NSF/ANSI 58 covers reverse osmosis systems. The standard number alone does not prove reduction of every contaminant; check the exact model listing and claims.
Does a shower filter replace an RO system or water softener?
No. A shower filter treats shower water. It does not produce drinking water like RO or remove whole-house hardness like an ion-exchange softener.
RO FINDER
Not sure which one? Answer 6 questions.
Choose installation type, household size, mineralization, budget and faucet preference. The finder returns a primary RO system, an alternative and an optional add-on. Answers stay on your device.
Start the finderRO FINDER
Not sure which one? Answer 6 questions.
Six answers narrow 17 systems and accessories by installation, household size, mineralization, budget and TDS faucet preference.
Step 1 of 6
Can you install under the kitchen sink?
How large is your household?
Do you want alkaline or mineralized water?
What is your budget?
Do you want a faucet display for TDS and filter life?
What is your situation?
YOUR RECOMMENDATION
Based on your answers.
The result is a starting point. Before buying, check your water, installation conditions, exact-model certification and replacement-filter cost.