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    10 Smart Ways to Use RO Water at Home (And 3 Places Not To)
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    10 Smart Ways to Use RO Water at Home (And 3 Places Not To)

    Sep 27, 2026 5 min read

    Your RO purifier delivers safe, great-tasting water. Here's how to get the most out of it every day.

    10 great uses of RO water

    1. **Drinking** — the obvious one, safe for the whole family. 2. **Cooking rice and dal** — no chalky taste from hard water. 3. **Tea and coffee** — clearer flavour and no scale in the kettle. 4. **Baby formula** — boil RO water once and cool before mixing. 5. **Washing fruits and vegetables** — final rinse with clean water. 6. **Making ice** — clear cubes without odour. 7. **Pets' drinking bowls** — same safety for your pets. 8. **Steam irons and humidifiers** — prevents white scale deposits. 9. **Car battery and radiator top-up** — low mineral content helps. 10. **Aquarium top-up** — mix with tap water as your fish type needs.

    3 places RO water isn't needed

    - **Bathing and laundry** — tap water is fine.

    • **Floor cleaning** — use the RO reject water instead.
    • **Flushing toilets** — perfect for reject water too.

    Reusing RO reject water

    An RO purifier sends some water to drain. Collect it in a bucket and use it for mopping, washing vehicles, flushing or watering hardy plants. Avoid using it on delicate plants if your input TDS is very high.

    Bottom line

    Use RO water for anything you eat or drink, and reuse the reject water for cleaning. iDrink purifiers are set up to minimise waste, and our technicians can show you the best reject-water setup at installation.

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