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An RO (Reverse Osmosis) filter is a water purification system that uses a semipermeable membrane and pressure to remove dissolved solids, contaminants, and impurities, producing clean, safe drinking water by separating pure water (permeate) from concentrated waste (reject). It often includes pre-filters (sediment, carbon) for larger particles and chemicals, followed by the RO membrane for tiny contaminants like salts, heavy metals, and bacteria, making hard water soft and suitable for consumption, especially when Total Dissolved Solids (TDS) are high.
Pressurization: A pump increases water pressure to force water through the system.
Multi-Stage Filtration: Water first passes through sediment and carbon filters to remove chlorine, dirt, and larger particles.
Reverse Osmosis: Water is pushed through a very fine RO membrane, blocking contaminants but letting pure water molecules pass.
Rejection: The concentrated impurities are flushed away in a reject stream.
Post-Filtration: Some systems add a final polishing filter for taste.
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