Quick Answer
Yes, there are gravity-bag filters that can filter salty water. These filters are designed to remove salt and other contaminants from seawater, making it safe for consumption. They are often used by sailors, campers, and emergency responders.
Selecting an Appropriate Filter
When choosing a gravity-bag filter for filtering salty water, consider the filter’s micron rating, flow rate, and durability. A filter with a micron rating of 0.1 or smaller is recommended for removing salt and other contaminants. The filter’s flow rate should be at least 1 liter per minute to ensure efficient water purification. Durability is also crucial, as the filter will be subjected to harsh environments and chemicals.
Filter Maintenance and Use
To maintain the filter’s effectiveness, clean it regularly by soaking it in vinegar or a mixture of baking soda and water. This will remove any salt residue and prevent clogging. When using the filter, attach it to a gravity bag or a water container, and allow the water to flow through the filter. Monitor the filter’s flow rate and replace it according to the manufacturer’s instructions.
Recommended Filter Options
Some popular gravity-bag filters for filtering salty water include the MSR TrailShot, the Sawyer Mini, and the MSR AutoFlow. These filters meet the recommended micron rating and flow rate standards and are designed for rugged outdoor use. When selecting a filter, consider the specific needs of your situation and choose a filter that best meets those needs.
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