The K2553-JJ is excellent to be used with ice makers, refrigerators, RO systems, and beverage systems.The Omnipure K2553-JJ Nitrate Elimination Inline Water Clear out is a 2″ x 10″ Clear out cartridge that eliminates nitrates A520E. The K2553-JJ has a snappy-connect 1/four” FQC fitting for simple installation. The Omnipure K2553-JJ eliminates nitrates to provide you with nice tasting water.