Can I filter water other than tap water with ZeroWater?Updated 2 months ago

Use tap water only

ZeroWater filters are designed to filter cold tap water (mains water). This is the only water source for which the filters are tested, certified, and rated.

What not to filter

• Hot or warm water: Do not use water above approximately 30°C. Heat can damage the ion exchange resin inside the filter. See Can I filter hot or warm water?
• Well water or borehole water: Not recommended. Untreated well water may contain bacteria, viruses, and organic compounds that ZeroWater's ion exchange filter is not designed to handle.
• Rainwater or greywater: Not suitable. These sources can contain microorganisms and pollutants beyond the filter's scope.
• Bottled mineral water or sparkling water: You can filter these, but there's no practical benefit. The filter will simply remove the minerals, reducing the TDS to 000.
• Saltwater or highly contaminated water: Not suitable. Extremely high TDS water will exhaust the filter very quickly and the filter is not designed for desalination.

Pre-filtered or softened water

ZeroWater works fine on water that has already passed through a softener or another filter. In fact, starting with lower-TDS water means your ZeroWater filter will last longer.