Intex Krystal Clear Cartridge Filter Pump for Above Ground Pools, 530 GPH Pump Flow Rate, 110-120V with GFCI Easy to use - simply replace the old cartridge with a new one every two weeks Double insulated pump Air release valve for air trapped inside filter chamber Sediment flush falve at bottom of filter chamber Works with 8-feet /10-feet /12-feet Easy Set pools, 10-feet /12-feet Frame pool models