ClearChoice polypropylene cartridges are best used for removing sediment from municipal and well water.  Often used in under-sink (point-of-use) systems, pre-filtration for RO systems and post-filtration for granular activated carbon filters. ClearChoice filters have gradient density for greater dirt holding, which traps large particles in the outer layers and smaller particles in the inner layers.  They are also used in applications such as Ice Machines, Film Processing, Beverage, Coffee, Analytical, Wineries, and many others