Every reverse osmosis unit has a membrane.
The reverse osmosis membrane is which is
semi-permeable, can be degraded by chlorine.
Chlorine must be removed from the water
using a carbon filter.
A sediment pre-filter cartridge filter can be used to protect the carbon filter.
3 filter components complete the 3 stages required for all reverse osmosis systems.
See Stage 1 / 2 / 3 & 4