PETT Pleated Filter (PP) 20 5 micron Sediment 20x2.5 - Pleated Filter (PP) 5 micron standard 20 inches. - The pleated configuration provides larger surface area allows greater dirt holding capacity - Pleated cartridge provides “depth” filtration and removes more contaminants large and fine particles from water such as sand dirt silt and rust particles. - Recommended shelf life 3-6 months depending on the water conditions used.