Three-Stage Filtration Process: The purification process involves a carbon filter to remove large impurities, dual RO membranes for the majority of purification, and a deionization (DI) stage to ensure total dissolved solids (TDS) levels below 10 ppm. This results in spot-free drying on glass surfaces Robust Construction: Built with a durable steel frame and high-quality brass, aluminum, and steel components, the XERO Pure MAX is designed to withstand the rigors of daily use. It avoids the use of cheap plastic parts, enhancing its longevity .​