The HydroCare PPF-2520-01 spun polypropylene water filter cartridge reduces sediment which typically serves as an RO Prefilter. This filter can also be used for a variety of water filtration needs, including residential, commercial, and municipal drinking water. PPF-2520-01 is a high quality replacement polypropylene sediment filter that fits any standard filter housings that use 20″ x 2.5″ filter cartridges.