Tap faucet water filter system filters odor and impurities found in some tap waters to deliver great-tasting water. These filters are BPA-free and are designed to last for up to four months or 100 gallons. The handy filter indicator lets you know that the filter is working and reminds you when a filter needs replacement. Enjoy better-tasting water, with quick replacement filter installation. WBM Home Advance Faucet Filtration System offers the great design, durability, and convenience you are looking for. W Home water filter replacement holds 5 stage composite functional filtration. 1. Diatom ceramic shells which are numerous tiny pores naturally formed on the outer shell of the diatom and are ideal for water filtration.