Stage 1. Pre-Filter
Removes coarse impurities from water to enhances the life of RO membrane and system.
Stage 2. Antiscalant
Increase life of Membrane.
Stage 3. Sediment Filter
Filtration of impurities such as dust, rust, grid, dirt and sludge from water.
Stage 4. Pre-Carbon
There is an activated carbon filter which filters organic chemicals, agricultural chemicals,
pigments, detergents and chlorine etc. If this is not done then the thin film composite reverse osmosis membranes would be attacked and degraded.