Understand the option
How reverse osmosis works
Reverse osmosis uses pressure to move water through a semipermeable membrane, separating a treated stream from a concentrate stream. Residential under-sink systems commonly include sediment and carbon pretreatment, a membrane, storage tank, post-filter, dedicated faucet, and sometimes a refrigerator connection. Performance depends on pressure, temperature, feed-water composition, membrane condition, and recovery design. A TDS meter can show broad rejection performance but does not identify every substance or prove microbiological safety.
