The Bestway Flowclear sand filter pump is a great choice for keeping your above-ground pool clean without additives or chemicals. The filter pump is based on a natural filtration system: water is pumped into a tank filled with quartz sand, which filters out impurities and particles, delivering clean water. The ChemConnect chemical dispenser ensures clean, healthy pool water by evenly distributing chlorine, which is necessary for the proper chemical balance. The pre-filter basket is an additional mechanism that captures larger particles such as leaves, hair, and dirt. It also protects the pump impeller and helps your pump run more quietly. This filter pump features a 6-position valve that can be adjusted for various functions related to pool water filtration: off (stopping water flow), backwash (for cleaning the sand bed), rinse (for initial startup, cleaning, and leveling the sand bed), draining water from the pool, and circulating pool water. The design of the upper flange clamp allows for a 360° rotation for quick and smooth installation. Note: Sand is not included. Voltage: 220-240V; Power: 85 W; Pumping capacity: 3028 L/h; Durable, corrosion-resistant filter tank; easy-to-read pressure gauge; includes ChemConnect chemical dispenser for clean and healthy pool water; pre-filter basket; pre-assembled for added convenience; suitable for hose diameter: 32 mm; compatible with most above-ground pools from 1100-16600 L; required sand: quartz sand #29 - 0.45-0.85 mm - approximately 8.5 kg (sand not included); 6-position valve for filtering, closing, backwashing, rinsing, draining, and circulating.