Sediment Water Filter Nominal 5 micron Pentek PD-5-934 POLYDEPTH Polypropylene Water Filter Cartridge. The Pentek PD-5-934 filter cartridge is a thermally bonded polypropylene micro-fiber construction for The Pentek PD-5-934 water filter has a consistent flow rate and superior filtration performance. The Pentek PD-5-934 water filter cartridge will not impart taste, odor or color to the water being The Pentek Polydepth PD-5-934 water filtration cartridge is constructed of thermally bonded polypropylene