Micro Star-Clear 25 square foot full-flo element filter systems are designed specifically for aboveground pools up to 15,000 gallons and includes a 40 gallon per minute pump and equipment base. Micro Star-Clear cartridge filters provide crystal clear water and have extra cleaning capacity. The filter features a single locking knob that securely fastens the filter head to the filter tank, eliminating bolts or clamps. The filter tank is injection molded for years of dependable and corrosion-free performance. The filter head may also be rotated to conveniently position the pressure gauge and manual air relief valve. An elevated, filtered water collector and debris sump prevents accidental by-pass of heavy debris to your pool or spa when cartridge is removed for cleaning. Easy-Lok lid access design provides simple entry to service the cartridge element and the built-in check valve also prevents accidental loss of pool water when cartridge is being removed. A union connection allows filter to be removed quickly and easily for servicing.