The Harmsco PP-20E-1 eliminates cysts, sediment, silt, and different harmful organisims to absolutely the micron level of 1.The Harmsco PP-20E-1 Poly-Pleat Pleated Water Filter out Cartridge is a 20″ x 2.75″ sediment Filter out in an effort to are compatible in such a lot same old housings. The Harmsco PP-20E-1 provides an absolute micron rating of 1 and a waft rate of 0.5 gpm.