Harmsco PP-S-1 POLY-PLEAT 1 Micron Absolute Sediment Water Filter. Harmsco® Absolute Rated Filter Cartridges for Safe, Cyst-free Drinking Water. PP-S-1 water filter is a 1 absolute sediment water filter. POLY-PLEAT™ Filter Cartridges Substantially Remove: . Cryptosporidium . Giardia cysts . Harmful organisms . Sediment . Silt . Turbidity . And more!. . Absolute rated one micron filter media removes cyst-sized particles for safe, cyst-free drinking water. . Pleated polypropylene filter media provides more surface area for longer filter life and increased particle removal. . FDA listed materials for use in potable water and liquid food applications. . End caps, center tubes and media are thermally bonded as one integral component for added strength and to provide superior end sealing. . Full product line for standard, Big-Blue and Hurricane® filter housings.Low Pressure Drop Initial pressure drop using POLY-PLEAT™ cartridges is exceptionally low due to our pleated design and increased surface area. . Economical cartridges from the value leader in the industry! 9-3/4 x 2-3/4. 24 per case. Sold and priced individually. Buy a full case and save even more.