RO vs UV vs UF: Which Water Purifier Is Right for You?
RO, UV and UF purifiers work in different ways. Compare what each removes, running costs and which one suits water in Bangladesh.
RO, UV and UF are the three most common purification technologies. They are often combined, but each solves a different problem.
| RO | UV | UF | |
|---|---|---|---|
| How it works | Pushes water through a fine membrane | Ultraviolet light kills microbes | Hollow-fibre membrane filters particles |
| Removes dissolved salts & arsenic | Yes | No | No |
| Kills / removes bacteria | Yes | Yes | Yes (removes) |
| Needs electricity | Yes | Yes | No |
| Waste water | Some | None | None |
| Best for | High-TDS tubewell water | Low-TDS, bacteria risk | Low-TDS supply water |
When to choose RO
Choose RO if your water has high TDS, arsenic, hardness or a salty taste — common with deep tubewells. See RO water purifiers.
When to choose UF
UF is ideal for city supply water with low TDS. It works without electricity and wastes no water. See UF purifiers.
When UV helps
UV is usually added as a final stage to kill bacteria in stored water. It does not remove dissolved chemicals, so it is rarely used alone.
Many homes need a combination
Most modern purifiers combine RO with UV or UF and a mineral stage. If your water also carries iron, fit an iron pre-filter first — read best filter for iron in water.
Need help? Book our water filter service or call us — a technician can test your water and recommend the right solution.
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