North Star® Grain Water Softener, Point-of-Entry, 7.2 gpm Service/11.8 gpm Intermittent Flow Rate, 31300 Grains Capacity, 12.9 lb Salt Storage, 20 to 125 psi Pressure, High Flow Bypass Valve, Gray, 16-1/2 in Dia x 19-3/4 in W x 47-3/4 in H, For Use With: Medium to Large Households, Domestic