The APEC 2-stage filtration system uses two (2) 20" BB specialty filters to effectively treat a variety of water concerns. This point-of-entry combo system can effectively filter out sediment, chemicals and chlorine to deliver clean and safe water to all of your water faucets. Uniquely designed for versatile use to meet all of your large capacity filtration needs. Suitable for simple whole house water filtration, light commercial use or industrial applications. 2-In-One System designed to effectively remove sediment & chlorine Delivers clean, clear, odor-free water throughout every faucet 1st stage reusable sediment filter reduces dirt, sand, silt & rust particles 2nd stage carbon filter adsorbs chlorine, taste, odor & organic compounds (VOCs) Versatile use suitable for residential, commercial & industrial usage Durable, highest quality 20" Big Blue filter housings Pre-assembled complete system ready to mount