CES-5600E-15, Single Tank Water Conditioner, 8,768 grains/tank @ 2.25 lbs. salt, 3,897 grains/lb of salt efficiency rating, 0.5 cu.ft. resin volume, 3 gpm continuous @15psi (1 bar), 3/4 inch pipe size, 60 ship weight, 120 operating weight, NSF/ANSI Standard 44 (DEV998053)