By reducing the pump pressure required for filter operation and using less water to clean, you can keep your pool clean with energy efficiency and prolong the life of your pool's pump. This cartridge filter requires less maintenance that other filter types and features lid lifting handles and an assist locking ring making it easy to clean. No backwashing is necessary with cartridge filters, simply lift the lid, take out the cartridges and rinse them off with your hose. For longevity, energy efficiency, and dependability choose the J-CQ420 420 sq. ft. Professional-Grade Cartridge Filter for your pool!