The K5686-KK has a go with the flow rate of 0.5 gpm and is excellent to be used with ice makers, refrigerators, RO systems, and beverage systems. Replace the Omnipure K5686-KK each 6 months or 2000 gallons.The Omnipure K5686-KK GAC & Phosphate Inline Water Clear out Cartridge is a 2.five” x 12″ carbon GAC and phosphate Clear out cartridge. The K5686-KK has a snappy-connect 3/8″ FQC fitting for simple installation. The Omnipure K5686-KK reduces chlorine style and odor whilst preventing lime and scale deposits.