After passing through this filter, the water may appear to be clean. However, looks can be deceiving and most water contaminants are smaller than what our eyes can see. These contaminants may not be removable by the sole use of a sediment filter.
Sediment filters are rated by a micron number. A micron is a unit of length that is equal to one millionth (10-6) of a meter. The most common sediment filters available are 1, 5, 10, 20 and 50um (micron) filters. The micron number refers to the largest dirt particle that will pass through the filter.