GE GNSF35Z is an electronic water softener that uses demand-initiated regeneration to deliver soft water throughout your home, filter standard mesh resin and reduce the hardness of your water by up to 100 grains per gallon. With a salt storage capacity of 200 pounds, the GNSF35Z efficiently uses 40-50 gallons of water per regeneration and has a maximum iron reduction of 6 parts per million. Its 24-volt electronic system is controlled via simple-to-set electronic controls that feature a permanent memory. Installation kit, bypass valve, and drain tubing are included.