10 Best Reverse Osmosis Systems 2025 in the United States

The APEC Water Systems ROES-PH75 Essence Series is a robust 6-stage reverse osmosis system designed to provide ultra-pure drinking water. One of its standout features is the 75 Gallons Per Day (GPD) water output, which is adequate for a household's daily needs. The system includes a 6-stage filtration process that ensures up to 99% of contaminants, including chlorine, fluoride, arsenic, lead, and heavy metals, are removed. This level of filtration is particularly impressive and beneficial for those concerned about water safety and health.

Additionally, it enhances water alkalinity by adding calcium minerals, which can improve taste and health benefits. The inclusion of an extra set of pre-filters (stages 1-3) is a value-added benefit, reducing maintenance costs for the first year. The filters need replacement every six months to ensure optimal performance, which is relatively standard for systems of this type. The system is designed to be noise-free and dependable, which adds to its appeal. Installation is under the sink, and while the dimensions (16 x 5.25 x 18 inches) are fairly compact, installation might require some basic plumbing skills or professional help.

Its certification by WQA and a strong reputation in the market for over 20 years indicate reliability and trustworthiness. Therefore, the APEC ROES-PH75 is a high-quality reverse osmosis system suitable for households seeking safe, great-tasting, and mineral-enhanced drinking water, albeit with some considerations around installation.

The iSpring RCC7AK-UV is a comprehensive 7-stage reverse osmosis water filtration system designed for under-sink installation. It effectively removes up to 99% of over 1,000 contaminants including harmful substances like lead, fluoride, arsenic, and PFAS, making it a strong choice for households concerned about water purity. What sets it apart is the addition of an ultraviolet (UV) filter stage that helps eliminate bacteria and viruses, making it suitable for well or less reliable water sources. The system also includes an alkaline remineralization filter that restores healthy minerals and improves water taste, addressing a common downside of typical RO systems that strip minerals out.

The system’s water output is moderate, with a maximum flow rate around 132 cubic centimeters per minute (roughly 1.9 gallons per hour), which may be slower than some users expect. It does not include a booster pump, so if your water pressure is low, you might need to purchase this separately. The clear first-stage housing makes filter checks easy, and the system is certified by NSF to ensure performance and safety standards.

The unit weighs 28 pounds and measures about 15" x 8" x 18", requiring decent under-sink space and some effort to install. Like many RO systems, it produces wastewater during filtration. Regular filter replacement is needed to maintain effectiveness, with frequency depending on usage and water quality. With its thorough contaminant removal, added UV protection, and mineral restoration, this model is a solid pick for users wanting cleaner, safer water from a trusted brand, especially if the water source might include bacteria or viruses.

The APEC Water Systems ROES-50 Essence Series is a robust reverse osmosis system that provides top-notch water filtration with its 5-stage process. This system is designed to remove up to 99% of impurities, including heavy metals and other contaminants, making it suitable for households concerned with water purity. Its certification by the Water Quality Association (WQA) adds credibility to its safety and effectiveness claims.

A highlight of this system is its impressive contaminant removal capability, which ensures your drinking water is as clean as can be. The system's filters are long-lasting, providing a good balance between performance and maintenance frequency, which is an important consideration for many users.

On the downside, the water output is modest, with a maximum flow rate of 0.03 gallons per minute. This might not be sufficient for larger households or those with high water consumption needs. The storage tank capacity also affects how quickly you have access to filtered water, which could be limiting if you use a lot of purified water in a short period. Installation is designed to be under-sink, which is convenient for saving space but may require professional help if you are not comfortable with DIY projects. The system's dimensions are manageable, yet it does need adequate space under your sink.

The APEC ROES-50 is ideal for people looking for a reliable and efficient reverse osmosis system to improve their water quality significantly, as long as they are mindful of its flow rate and potential installation requirements.