Do It Best 32,000 Grain Water Softener

32,000 grain removal capacity/100 grain per gallon maximum hardness. Removes up to 4 ppm (parts per million) of clear water iron. The demand regeneration control can save up to 50% in salt and uses considerably less water by regenerating only when needed. Back wash would be 50-60 minutes and about 68 gallons per regeneration. Includes brass bypass valve. 3 year limited warranty on valve head. 10 year limited warranty on mineral tank. Mineral tank is 9" x 48" H. Brine tank is 14" x 14" x 34" H. and will hold 225 lb. of salt.