Updated:April, 2026

10 Best Reverse Osmosis Whole House Water System of 2026

Best Choice

9.9

Outstanding

Aquasure

Aquasure 64,000 Grains Whole House Water Filter Bundle with Automatic Digital Metered Control Softener and 75 GPD RO Reverse Osmosis Drinking System | Removes Hardness | Ideal for 4-6+ bathrooms

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Why We Love It

Perfect for homes with 4 to 5 bathrooms and up to 6 family members, who desires softened water and clean, pure drinking water for the whole family.
Rated to treat 64,000 grains of hardness by removing skin damaging hard minerals like iron and magnesium that clog up the skin pore and cause irritation.
Exceptional performance & high efficient Aquatrol control head and Aquasure reverse osmosis membrane help save water and reduce overall maintenance cost.
Constructed of high strength, premium-quality materials with built-in safety features that ensure your home is protected even during system downtime.
Up to 5-years manufacturer warranty with lifetime tech support for the life of the system.

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Why We Love It

Perfect for homes with 4 to 5 bathrooms and up to 6 family members, who desires softened water and clean, pure drinking water for the whole family.
Rated to treat 64,000 grains of hardness by removing skin damaging hard minerals like iron and magnesium that clog up the skin pore and cause irritation.
Exceptional performance & high efficient Aquatrol control head and Aquasure reverse osmosis membrane help save water and reduce overall maintenance cost.
Constructed of high strength, premium-quality materials with built-in safety features that ensure your home is protected even during system downtime.
Up to 5-years manufacturer warranty with lifetime tech support for the life of the system.

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9.5

Excellent

iSpring

iSpring CRO1000 4-Stage Tankless Commercial Reverse Osmosis Water Filtration System, for House, Restaurant, Small Business, and Light Industrial Use,1000 GPD High Flow, Upgraded Size Filters

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Main Highlights

COMMERCIAL RO SYSTEM WITH RELIABLE FEATURES - The iSpring CRO1000 is a true commercial-grade reverse osmosis system with a high output of 1,000 GPD. Its tankless design provides on-demand clean, filtered water with a flow rate of 0.7 GPM. Built-in inlet and outlet gauges allow for easy pressure monitoring. The optional PMP1000 booster pump is recommended for water pressure below 80 psi (working range: 80-130 psi).
HIGH-EFFICIENCY COMMERCIAL-SIZE RO MEMBRANE - Removes up to 99% of over 1,000 contaminants, including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more. Its large membrane size ensures superior filtration and a continuous supply of purified water.
4-STAGE WATER FILTRATION - Equipped with commercial-grade filters: a 20 x 4.5 PP Sediment Filter with a transparent housing for easy monitoring, two 20 x 4.5 Carbon Block Filters to enhance taste, and a 1,000 GPD RO Membrane housed in stainless steel for durability.
EASY INSTALLATION & MAINTENANCE - The freestanding metal frame on wheels allows easy movement with locking brakes for stability. Replace the 1st stage filter every 3-6 months, 2nd and 3rd stage filters every 6-12 months, and the RO membrane every 2-3 years, depending on water quality.
VERSATILE APPLICATIONS - Connect the CRO1000 to your choice of water dispensers, drinking water faucets, ice makers, refrigerators, espresso machines, hydroponic systems, and more. Ideal for residential use, offices, and small businesses like restaurants, coffee shops, bars, tea shops, breweries, spas, and clinics.

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Main Highlights

COMMERCIAL RO SYSTEM WITH RELIABLE FEATURES - The iSpring CRO1000 is a true commercial-grade reverse osmosis system with a high output of 1,000 GPD. Its tankless design provides on-demand clean, filtered water with a flow rate of 0.7 GPM. Built-in inlet and outlet gauges allow for easy pressure monitoring. The optional PMP1000 booster pump is recommended for water pressure below 80 psi (working range: 80-130 psi).
HIGH-EFFICIENCY COMMERCIAL-SIZE RO MEMBRANE - Removes up to 99% of over 1,000 contaminants, including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more. Its large membrane size ensures superior filtration and a continuous supply of purified water.
4-STAGE WATER FILTRATION - Equipped with commercial-grade filters: a 20 x 4.5 PP Sediment Filter with a transparent housing for easy monitoring, two 20 x 4.5 Carbon Block Filters to enhance taste, and a 1,000 GPD RO Membrane housed in stainless steel for durability.
EASY INSTALLATION & MAINTENANCE - The freestanding metal frame on wheels allows easy movement with locking brakes for stability. Replace the 1st stage filter every 3-6 months, 2nd and 3rd stage filters every 6-12 months, and the RO membrane every 2-3 years, depending on water quality.
VERSATILE APPLICATIONS - Connect the CRO1000 to your choice of water dispensers, drinking water faucets, ice makers, refrigerators, espresso machines, hydroponic systems, and more. Ideal for residential use, offices, and small businesses like restaurants, coffee shops, bars, tea shops, breweries, spas, and clinics.

9.5

Excellent

Reverse Osmosis Revolution

Whole House 3-Stage Water Filtration System, 3/4" Port with 2 valves and Extra 3 Filters Set

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Main Highlights

1st stage: Premium Quick-Connect 5 micron sediment filter. Dust, dirt, silt, sand, rust and scale particles are trapped here in a filter which also extends the life of the system.
2nd stage: Premium 10" GAC Granular Activated Carbon filter removes chlorine, radon, VOCs (volatile organic compounds) and other common chemicals. This filter also removes cloudiness, offensive odors, colors and unpleasant tastes.
3rd stage: 10" Premium CTO Carbon Block filter removes chlorine, VOCs (volatile organic compounds, including insecticides, pesticides and industrial solvent). Taste improvement. Build in USA.
Connection: 3/4" thread. Color of housing: semiclear
included 1 extra set of filters as a replacement. You need to change filters every 6 months.

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Main Highlights

1st stage: Premium Quick-Connect 5 micron sediment filter. Dust, dirt, silt, sand, rust and scale particles are trapped here in a filter which also extends the life of the system.
2nd stage: Premium 10" GAC Granular Activated Carbon filter removes chlorine, radon, VOCs (volatile organic compounds) and other common chemicals. This filter also removes cloudiness, offensive odors, colors and unpleasant tastes.
3rd stage: 10" Premium CTO Carbon Block filter removes chlorine, VOCs (volatile organic compounds, including insecticides, pesticides and industrial solvent). Taste improvement. Build in USA.
Connection: 3/4" thread. Color of housing: semiclear
included 1 extra set of filters as a replacement. You need to change filters every 6 months.

9.2

Excellent

iSpring

iSpring Ultimate Protection Whole House Water Filter System, Reduces Heavy Metals, Scale, Chlorine, Chloramine, Hydrogen Sulfide, 3-Stage Filtration, 1" Inlet/Outlet, Model: WGB31B-KDS

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Main Highlights

Scale & Corrosion Defense: Protect your pipes and appliances with the WGB31B-KDS whole house water filter system. This whole house water descaler uses a patented inhibitor to reduce calcium and magnesium buildup, combat corrosion, and create a protective biofilm barrier.
Specialized Heavy Metals Filtration: The FG15B-KS filter in the WGB32B-KDS whole house water filter system targets chlorine, chloramine, lead, mercury, and hydrogen sulfide, ensuring comprehensive protection for your homes water supply.
Chlorine & Odor Reduction: The third-stage carbon water filter removes residual chlorine, odors, and unpleasant tastes, delivering crisp, clean water throughout your home.
Reliable Filtration, Low Upkeep Engineered for long-lasting use, this compact whole house water filter system supports up to 15 GPM and treats up to 80,000 gallons. Individually sealed cartridges ensure peak freshness and performanceunwrap before installation.
Compact, Space-Saving Design Designed for tight spaces like apartments, condos, and vacation homes, this system delivers the same high-performance filtration found in larger systems with a smaller footprint.
Easy Filter Changes Built-in pressure release buttons let you swap filters fast and mess-free.
Peace of Mind Guaranteed Supported by a 1-year limited warranty and lifetime technical support from our U.S.-based customer service team. Whether you're purchasing your first whole house water filtration system or replacing your current home water filter, we're here to help before and after your purchase.
Healthy Minerals Retained This filter retains healthy minerals and does not reduce TDS. For total dissolved solids removal, explore our iSpring Reverse Osmosis systemsperfect complements to any water filtration system for house.

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Main Highlights

Scale & Corrosion Defense: Protect your pipes and appliances with the WGB31B-KDS whole house water filter system. This whole house water descaler uses a patented inhibitor to reduce calcium and magnesium buildup, combat corrosion, and create a protective biofilm barrier.
Specialized Heavy Metals Filtration: The FG15B-KS filter in the WGB32B-KDS whole house water filter system targets chlorine, chloramine, lead, mercury, and hydrogen sulfide, ensuring comprehensive protection for your homes water supply.
Chlorine & Odor Reduction: The third-stage carbon water filter removes residual chlorine, odors, and unpleasant tastes, delivering crisp, clean water throughout your home.
Reliable Filtration, Low Upkeep Engineered for long-lasting use, this compact whole house water filter system supports up to 15 GPM and treats up to 80,000 gallons. Individually sealed cartridges ensure peak freshness and performanceunwrap before installation.
Compact, Space-Saving Design Designed for tight spaces like apartments, condos, and vacation homes, this system delivers the same high-performance filtration found in larger systems with a smaller footprint.
Easy Filter Changes Built-in pressure release buttons let you swap filters fast and mess-free.
Peace of Mind Guaranteed Supported by a 1-year limited warranty and lifetime technical support from our U.S.-based customer service team. Whether you're purchasing your first whole house water filtration system or replacing your current home water filter, we're here to help before and after your purchase.
Healthy Minerals Retained This filter retains healthy minerals and does not reduce TDS. For total dissolved solids removal, explore our iSpring Reverse Osmosis systemsperfect complements to any water filtration system for house.

9.0

Excellent

Aquasure

Aquasure 48,000 Grains Whole House Water Filter Bundle with Automatic Digital Metered Control Softener and 75 GPD RO Reverse Osmosis Drinking System | Removes Hardness | Ideal for 3-4 bathrooms

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Main Highlights

Perfect for homes with 3 to 4 bathrooms and up to 4 family members, who desires softened water and clean, pure drinking water for the whole family.
Rated to treat 48,000 grains of hardness by removing skin damaging hard minerals like iron and magnesium that clog up the skin pore and cause irritation.
Exceptional performance & high efficient Aquatrol control head and Aquasure reverse osmosis membrane help save water and reduce overall maintenance cost.
Constructed of high strength, premium-quality materials with built-in safety features that ensure your home is protected even during system downtime.
Up to 5-years manufacturer warranty with lifetime tech support for the life of the system.

Check Price

Main Highlights

Perfect for homes with 3 to 4 bathrooms and up to 4 family members, who desires softened water and clean, pure drinking water for the whole family.
Rated to treat 48,000 grains of hardness by removing skin damaging hard minerals like iron and magnesium that clog up the skin pore and cause irritation.
Exceptional performance & high efficient Aquatrol control head and Aquasure reverse osmosis membrane help save water and reduce overall maintenance cost.
Constructed of high strength, premium-quality materials with built-in safety features that ensure your home is protected even during system downtime.
Up to 5-years manufacturer warranty with lifetime tech support for the life of the system.

8.8

Very Good

iSpring

iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink, Patented Top-Mounted Faucet Design for Easy Installation

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Main Highlights

PATENTED DESIGN The top-mounted fastener allows for easy countertop installation entirely from above, eliminating the hassle of tightening the nut from underneath the sink.
MINERAL BOOST The patent-pending natural mineral AK stage delivers spring water with a balanced, healthy pH and multiple essential minerals.
SEE WHATS CAUGHT The transparent first-stage filter housing makes it easy to monitor contaminant buildup, ensuring timely filter changes.
NSF 58 CERTIFIED RO SYSTEM Unlike other brands that lack NSF certification or full system certification, our RCC7AK is certified to NSF/ANSI 58 standards for the entire water filtration system.
EFFECTIVE FILTRATION Reduces TDS (93-98%), PFAS (96-99%), Chlorine (95-99%), Asbestos (>99.7%), Barium (>98.4%), Cadmium (>98.8%), Chromium (>99.2%), Copper (>97.8%), Fluoride (>97.4%), Lead (>98.9%), Selenium (>99.0%), and over 1,000 other contaminants.
EASY INSTALLATION The RO water system features a DIY-friendly design with quick-fitting connections, a clear manual, and step-by-step videos for a hassle-free setup.
TRUSTWORTHY SUPPORT Americas favorite RO brand, backed by lifetime technical support in Atlanta, GA, ensuring expert assistance whenever you need it.
CONVENIENT REPLACEMENT FILTERS - Easy access to replacement filter sets: F4AK (6-Month), F9K (1-Year), F19K75 (2-Year), and F28K75 (3-Year).

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Main Highlights

PATENTED DESIGN The top-mounted fastener allows for easy countertop installation entirely from above, eliminating the hassle of tightening the nut from underneath the sink.
MINERAL BOOST The patent-pending natural mineral AK stage delivers spring water with a balanced, healthy pH and multiple essential minerals.
SEE WHATS CAUGHT The transparent first-stage filter housing makes it easy to monitor contaminant buildup, ensuring timely filter changes.
NSF 58 CERTIFIED RO SYSTEM Unlike other brands that lack NSF certification or full system certification, our RCC7AK is certified to NSF/ANSI 58 standards for the entire water filtration system.
EFFECTIVE FILTRATION Reduces TDS (93-98%), PFAS (96-99%), Chlorine (95-99%), Asbestos (>99.7%), Barium (>98.4%), Cadmium (>98.8%), Chromium (>99.2%), Copper (>97.8%), Fluoride (>97.4%), Lead (>98.9%), Selenium (>99.0%), and over 1,000 other contaminants.
EASY INSTALLATION The RO water system features a DIY-friendly design with quick-fitting connections, a clear manual, and step-by-step videos for a hassle-free setup.
TRUSTWORTHY SUPPORT Americas favorite RO brand, backed by lifetime technical support in Atlanta, GA, ensuring expert assistance whenever you need it.
CONVENIENT REPLACEMENT FILTERS - Easy access to replacement filter sets: F4AK (6-Month), F9K (1-Year), F19K75 (2-Year), and F28K75 (3-Year).

8.6

Very Good

iSpring

iSpring RCB3P Tankless Reverse Osmosis Filtration System, 300 GPD Under Sink RO System, Reduces TDS, 1.5:1 Pure to Drain, Booster Pump & Pressure Gauge for Residential & Light Commercial Use

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Main Highlights

Under Sink RO Water Filtration System - This high-capacity reverse osmosis system removes up to 99% of over 1, 000 contaminants and hardness, including PFAS (PFOA and PFOS), lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium and more
Durable RO System & Easy Installation - Freestanding stainless steel frame and metal hanging bracket. Makes your installation and filter changes easier while adding a protective buffer for your system.
High Production Rate RO Water Filter - Super-efficient RO membranes deliver up to 300 gallons of purified reverse osmosis water per day, removing a wide range of contaminants as small as 0.0001 microns.
1.5:1 Pure to Drain Under Sink Tankless RO System - The built-in booster pump increases purified water production by raising water pressure. Compatible with 11- or 20-gallon iSpring storage tanks. TANK NOT INCLUDED
Residential & Light Commercial Use - The iSpring RCB3P tankless reverse osmosis system is perfect for light commercial use, delivering high-quality RO water to restaurants, salons, labs, and officeseach benefiting in their own unique way.

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Main Highlights

Under Sink RO Water Filtration System - This high-capacity reverse osmosis system removes up to 99% of over 1, 000 contaminants and hardness, including PFAS (PFOA and PFOS), lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium and more
Durable RO System & Easy Installation - Freestanding stainless steel frame and metal hanging bracket. Makes your installation and filter changes easier while adding a protective buffer for your system.
High Production Rate RO Water Filter - Super-efficient RO membranes deliver up to 300 gallons of purified reverse osmosis water per day, removing a wide range of contaminants as small as 0.0001 microns.
1.5:1 Pure to Drain Under Sink Tankless RO System - The built-in booster pump increases purified water production by raising water pressure. Compatible with 11- or 20-gallon iSpring storage tanks. TANK NOT INCLUDED
Residential & Light Commercial Use - The iSpring RCB3P tankless reverse osmosis system is perfect for light commercial use, delivering high-quality RO water to restaurants, salons, labs, and officeseach benefiting in their own unique way.

8.3

Very Good

EXPRESS WATER

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 17 x 5, White

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Main Highlights

Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more.
Water Purification System: Drink the healthiest water on Earth. All our water filters are specially engineered to work together, producing the safest and best tasting water youll ever drink
Under Sink Water Filter: Dont waste money on professional installation. Express Waters quick and easy-to-understand design means you can install and understand everything about your new water filtration system
Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Waters water filtration systems automatically fill your water tank with high quality drinking water
Leak Detection: Each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture
Help Has Arrived - Support from experts who can answer any of your questions about your homes water
Love your water - Environmentally friendly coconut carbon filters give unequalled quality and a clear natural taste

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Main Highlights

Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more.
Water Purification System: Drink the healthiest water on Earth. All our water filters are specially engineered to work together, producing the safest and best tasting water youll ever drink
Under Sink Water Filter: Dont waste money on professional installation. Express Waters quick and easy-to-understand design means you can install and understand everything about your new water filtration system
Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Waters water filtration systems automatically fill your water tank with high quality drinking water
Leak Detection: Each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture
Help Has Arrived - Support from experts who can answer any of your questions about your homes water
Love your water - Environmentally friendly coconut carbon filters give unequalled quality and a clear natural taste

8.1

Very Good

iSpring

iSpring Whole House Water Filter System, Reduces Iron, Manganese, Chlorine, Sediment, Taste, and Odor, 3-Stage Iron Filter Whole House, Model: WGB32BM

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Main Highlights

Whole house water filter that protect your family and household appliance from iron, manganese and more: Our 3rd stage iron water filter (FM25B) is specially designed for iron and manganese removal, reducing iron (MAX 3.0 ppm) and manganese (MAX 1.0 ppm). The water filter lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. This whole house water filter system also removes sediment, chlorine, rust, herbicides, industrial solvents, and more.
DIY installation and maintenance - refer to our manual and our helpful YouTube videos for easy DIY installation. With 1 in. NPT inlet / outlet and 20 in. x 4.5 in. water filter cartridges, WGB32BM whole home water filter system has minimum impact on water flow (up to 15 GPM) and requires minimum maintenance.
Top-notch quality - the first stage high capacity polypropylene sediment filter achieves filtration down to 5 microns. The second stage carbon block filter is made of high quality coconut shell carbon for maximum filtration efficiency and filter life. Both water filters are tested by an independent third-party to meet NSF/ANSI standards. Both water filters have a capacity of 100,000 Gal. of water, enough to supply a family of four with clean water for a full year.
Peace of mind customer service - register online to activate your 1-year manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
Please note - this whole house water filter is installed at the main water supply line in order to treat all the water in your home; unlike an RO system, this whole house water filtration system will NOT reduce Total Dissolved Solids (TDS) and instead keeps healthy minerals in your water; if you are interested in a filter that removes TDS consider our iSpring Reverse Osmosis (RO) systems. The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use.

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Main Highlights

Whole house water filter that protect your family and household appliance from iron, manganese and more: Our 3rd stage iron water filter (FM25B) is specially designed for iron and manganese removal, reducing iron (MAX 3.0 ppm) and manganese (MAX 1.0 ppm). The water filter lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. This whole house water filter system also removes sediment, chlorine, rust, herbicides, industrial solvents, and more.
DIY installation and maintenance - refer to our manual and our helpful YouTube videos for easy DIY installation. With 1 in. NPT inlet / outlet and 20 in. x 4.5 in. water filter cartridges, WGB32BM whole home water filter system has minimum impact on water flow (up to 15 GPM) and requires minimum maintenance.
Top-notch quality - the first stage high capacity polypropylene sediment filter achieves filtration down to 5 microns. The second stage carbon block filter is made of high quality coconut shell carbon for maximum filtration efficiency and filter life. Both water filters are tested by an independent third-party to meet NSF/ANSI standards. Both water filters have a capacity of 100,000 Gal. of water, enough to supply a family of four with clean water for a full year.
Peace of mind customer service - register online to activate your 1-year manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
Please note - this whole house water filter is installed at the main water supply line in order to treat all the water in your home; unlike an RO system, this whole house water filtration system will NOT reduce Total Dissolved Solids (TDS) and instead keeps healthy minerals in your water; if you are interested in a filter that removes TDS consider our iSpring Reverse Osmosis (RO) systems. The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use.

8.1

Very Good

Reverse Osmosis Revolution

Whole House 3-Stage Water Filtration System, 3/4" port with 2 valves and extra 1 year filter supply (2 sets, 6 pcs)

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Main Highlights

1st stage: Premium Quick-Connect 5 micron sediment filter. Dust, dirt, silt, sand, rust and scale particles are trapped here in a filter which also extends the life of the system.
2nd stage: Premium 10" GAC Granular Activated Carbon filter removes chlorine, radon, VOCs (volatile organic compounds) and other common chemicals. This filter also removes cloudiness, offensive odors, colors and unpleasant tastes.
3rd stage: 10" Premium CTO Carbon Block filter removes chlorine, VOCs (volatile organic compounds, including insecticides, pesticides and industrial solvent). Taste improvement. Build in USA.
Connection: 3/4" thread.
included 2 extra sets of filters as a replacement. You need to change filters every 4-6 months.

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Main Highlights

1st stage: Premium Quick-Connect 5 micron sediment filter. Dust, dirt, silt, sand, rust and scale particles are trapped here in a filter which also extends the life of the system.
2nd stage: Premium 10" GAC Granular Activated Carbon filter removes chlorine, radon, VOCs (volatile organic compounds) and other common chemicals. This filter also removes cloudiness, offensive odors, colors and unpleasant tastes.
3rd stage: 10" Premium CTO Carbon Block filter removes chlorine, VOCs (volatile organic compounds, including insecticides, pesticides and industrial solvent). Taste improvement. Build in USA.
Connection: 3/4" thread.
included 2 extra sets of filters as a replacement. You need to change filters every 4-6 months.

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