APEX RF-5100 Replacement Filter 5 Pack 5 Micron Sediment Pre Filter ASD-10 to to extract suspended materials such as sediment, rust, insects, and other particles. 2x 5 Micron Carbon Block Cartridge reduces chloramines- the by-product of chlorine and ammonia used in water disinfection. Reduces organic chemicals: pharmaceuticals, herbicides, pesticides, volatile organic chemicals, MTBE , disinfectant by-products and other chemicals for improved taste and elimination of odors. The double carbon briquettes filter out organic matter from water without release of carbon fines. The carbon block prepares water to enter the reverse osmosis element. The high- rejection (up to 95%) TFC (Thin-Film composite) 100 GPD membrane to reject a wide range of total dissolved solids (TDS). The product water is storage tank, while the reject water (drain) is automatically flushed down the drain. In line GAC filter to remove dissolved gases, bad taste and odor from product water. This is the final polishing stage before consumption.