The APPLIED MEMBRANES INC. 100 GPD Reverse Osmosis Membrane is a top-tier replacement for RO systems, designed to deliver the purest water by removing up to 99.9% of impurities, including heavy metals and total dissolved solids (TDS). Certified to NSF/ANSI 58 standards, it effectively reduces contaminants like arsenic, lead, fluoride, and more.

Users praise its performance in removing salts and smaller impurities, with many noting it works as advertised. Installation is straightforward, and the membrane fits universal systems with a 1.8” x 12” design. However, some caution against using it with Watts Premier WP systems due to missing built-in check valves or brine seals, which can cause backflow issues.

For those with high TDS levels or demanding applications like saltwater aquariums, this membrane performs exceptionally well. Regular testing shows consistent results, though some users report varying TDS levels depending on water temperature and pressure.

While most reviews are positive, a few users experienced issues with higher TDS readings after installation compared to older membranes. Overall, this product is a reliable choice for RO system maintenance, offering excellent compatibility and performance for most setups.