Spun polypropylene nominal 1 micron sediment reduction filter for 10 inch filter housings. Stage 1 of your system. This product contains FOUR poly 1 micron sediment filters. For use as a prefilter and for protection against particulates. Best if changed every six months. This filter will change color quickly, this does not indicate exhaustion of the filter. Exhaustion of the filter is usually accompanied by pressure loss to the system.
