The Omnipure (Q5554-C100E) is a cation exchange softening cartridge which reduces hardness and scale deposits. This filter helps in softening your water.
Omnipure Q5554-C100E Q-Series Water Softening Filter Specs:Dimensions: 2.5" W X 10" LFlow Rate: .5 GPMMaximum Pressure: 125 PSIGMaximum Temperature: 100 FService Life: 600 grains of hardnessFiltration Media: C100E FDA grade softener resinReduces: Hardness and Scale DepositsFitting Size: This Q-Series filter is a replacement filter and must be used with an existing Q-Series head. The Q-Series heads are available in 1/4" Quick-Connect fittings, 1/4" NPT female threads, or 3/8" NPT female threads.