Top Reverse Osmosis Brands for Premium Water Purity

With growing concerns over water quality, reverse osmosis systems have emerged as a go-to solution for ensuring clean and safe drinking water in households. Several top brands have made significant strides in this area, each offering unique features and technologies to cater to various needs. When selecting the perfect reverse osmosis system, it's essential to consider factors such as filtration efficiency, ease of installation, and maintenance requirements. For a comprehensive look at some of the best brands in the market today, explore the list below.

Illustration of reverse osmosis system

Best brands of reverse osmosis system in 2025

APEC Water Systems

APEC Water Systems is a leading manufacturer of reverse osmosis water filtration systems, boasting over 25 years of experience and a reputation for supreme product quality. Their systems are designed and engineered in the USA, ensuring 99% contaminant removal and providing ultra-fresh, healthy drinking water. APEC Water's products are WQA Gold Seal Certified, guaranteeing top performance, quality, and durability. Their systems are recommended by doctors, dietitians, and satisfied users, and each system can help reduce the use of plastic bottles significantly. With advanced purification technology, APEC Water systems are ideal for home use, offering reliable and long-lasting performance.

iSpring

iSpring is a leading brand in the production of reverse osmosis systems, renowned for its high-efficiency filters that can remove up to 99% of over 1,000 harmful contaminants, including arsenic, asbestos, chlorine, fluoride, and lead. The iSpring 6-Stage Reverse Osmosis System, such as the RCC7AK, is certified by NSF/ANSI 58 and features an Alkaline Remineralization filter to restore healthy minerals and maintain a balanced alkalinity, enhancing the natural taste of the water. This system can filter 0.05 gallons per minute, or 75 gallons of filtered water per day. iSpring's products are known for their reliability, ease of setup, and minimal maintenance requirements. With a 1-year limited manufacturer warranty and lifetime personalized support, iSpring ensures long-term satisfaction for its customers.

Home Master

Home Master is a leading brand in the reverse osmosis water filtration market, known for its innovative solutions that address common issues such as TDS creep, slow flow rates, and high water waste. Their systems, like the Home Master TMAFC Artesian Full Contact Reverse Osmosis System, utilize dedicated 5-micron sediment prefilters and optional non-electric permeate pumps to reduce wastewater by up to 80% and increase production by up to 50%, achieving a near 1:1 waste to purified water ratio. This technology enhances system efficiency and provides cleaner water by virtually eliminating TDS creep. Home Master's modular filters, changed annually, ensure a more hygienic system and prevent leaks associated with traditional canister-type RO systems. With their focus on better water efficiency and faster flow rates, Home Master stands out in the market.

Aquasana

Aquasana is a leading brand in the reverse osmosis market, known for its high-efficiency SmartFlow® Reverse Osmosis system, which removes up to 99.99% of 90 contaminants, including fluoride, arsenic, chlorine, and lead. Certified by the WQA to NSF/ANSI Standards 42, 53, 58, 401, and CSA B483.1, this system ensures rigorous quality standards. Acquired by A.O. Smith in 2016, Aquasana has continued to expand its product offerings and global presence, with a significant growth rate of 19% CAGR over three years. The system features a patented SmartFlow® membrane and includes a remineralizer to restore healthy minerals lost during the RO process. Despite some efficiency and design drawbacks, Aquasana's products are highly regarded for their effectiveness and taste.

Express Water

Express Water is a leading producer of reverse osmosis systems, renowned for their high-efficiency water filtration solutions. Their RO systems are proven to reduce up to 99.99% of 158 impurities and Total Dissolved Solids (TDS), ensuring clean and safe drinking water. Tested by QFT Laboratory, LLC, in compliance with NSF/ANSI standards, these systems demonstrate exceptional performance. The company's commitment to quality is evident in their rigorous testing procedures, completed as recently as August 2021. With such stringent standards, Express Water stands out as a reliable choice for those seeking effective water purification. For more detailed test results, you can visit their testing page.

Waterdrop

Waterdrop is a leading brand in the reverse osmosis system market, renowned for its high-efficiency and innovative products. The Waterdrop G3P600 RO system, for instance, produces 600 gallons of filtered water per day and features a 2:1 pure to drain ratio, significantly reducing wastewater compared to traditional systems. With certifications from NSF/ANSI and compliance with EU and UKCA standards, Waterdrop ensures top-quality filtration, removing a wide range of contaminants including TDS, chromium, and heavy metals. Over 2 million American families have chosen Waterdrop RO systems for their smart design and excellent performance. The brand's products are also praised for their easy installation and value for money, with customer reviews rating above 4.7.

Culligan

Culligan is a leading producer of reverse osmosis systems, known for their high-efficiency and comprehensive water treatment solutions. Their systems, such as the Culligan(r) G3 Series, can process large volumes of water, achieving a salt rejection rate of over 98% and a filtration capacity of up to 288,000 gallons per day. The company's systems are custom-built to handle various water conditions, including high TDS and chlorine levels, ensuring optimal performance and maintenance efficiency. With a market presence spanning over 25 years, Culligan's Aquasential(r) Reverse Osmosis Drinking Water Filtration System has been praised for its effectiveness in removing contaminants, producing up to 50 gallons of purified water per day. The global reverse osmosis membrane market, in which Culligan operates, is projected to grow significantly, with a CAGR of 10% from 2022 to 2030.

Brondell

Brondell is a leading brand in the reverse osmosis market, known for its efficient and innovative water filtration systems. The Brondell H2O+ Circle Reverse Osmosis Water Filtration System (RC100) stands out for its Smart Valve technology, which reduces wastewater to an average of 2.1 gallons for every gallon of drinking water, making it up to 10 times more efficient than conventional RO systems. This system is certified to NSF/ANSI 42, 53, and 58 standards, ensuring the reduction of various contaminants including pentavalent arsenic, fluoride, and heavy metals. With a product efficiency rating of 33.5%, it offers significant water and power savings. The system's filters need to be replaced every 6 months for the sediment and pre-carbon filters, and every 24 months for the RO membrane filter.

Whirlpool

Whirlpool is a leading brand in the production of reverse osmosis systems, known for its high-quality and effective filtration technology. The Whirlpool WHER25 UltraEase™ Reverse Osmosis Filtration System, for example, is NSF certified to reduce over 25 contaminants, including chlorine taste and odor, lead, and dissolved solids, providing 99% lead reduction and generating 18.4 gallons of water per day. This system features a three-step filtration process with pre and post filters and a semi-permeable membrane, ensuring bottled-water quality at home. The filters last up to 6 months, and the membrane lasts up to 2 years, depending on water quality. With a 1-year factory warranty and easy DIY installation, Whirlpool's reverse osmosis systems are a reliable choice for clean drinking water. For more details, you can learn about their reverse osmosis filtration system.

Watts Premier

Watts Premier is a leading producer of reverse osmosis systems, renowned for its innovative and efficient solutions. The PWRO4ZRO model, for instance, is a four-stage zero waste reverse osmosis system that is 100% efficient, unlike other systems that can waste up to 4 gallons of water for every gallon of drinking water produced. This system is certified by NSF International and IAPMO, ensuring high-quality water at a fraction of the cost of bottled water. With a 50 gallons per day reverse osmosis membrane and a high flow non-air gap designed faucet, Watts Premier's systems are highly effective and user-friendly. The global reverse osmosis market, driven by such innovations, is projected to grow significantly, with the market size expected to reach USD 13.31 billion by 2032.