Keep your pool water clean and crystal clear with the help of the Bestway Flow Clear 2,500 GPH Above Ground Pool Filter Pump. This filter pump fits most above ground pools, and includes adapters for pool valves with an outer diameter of 1.25 inches. With a flow rate of 2,500 gallons per hour and integrated pool system flow rate of 1,900 gallons per hour, this pump has the power to filter pools up to 15,200 gallons in size. For the long life of your pool, invest in quality equipment and take care of your water with the Bestway Flow Clear 2,500 GPH Above Ground Pool Filter Pump. The included Filter Cartridge Type IV, Type B is a replacement swimming pool filter cartridge for your 2,100 and 2,500 gallons/hour filter pump. This filter cartridge sifts out the debris and dirt in your above ground swimming pool so the pump can refill it with clean pool water. It's recommended you replace your filter cartridge every few weeks to ensure your pool obtains the highest standard of cleanliness and hygiene. When you maintain your pool's filter, the water in your pool stays attractive and fresh all summer long, which makes it all the more enjoyable for your family and friends.