Multi-Tank Water Softener Single Tank Maximum Grain Capacity 71 000 Brine Tank Capacity 340 lb Total Number of Tanks 3 Number of Resin Tanks 2 Number of Brine Tanks 1 Brine Tank Diameter 17 in Brine Tank Height 38 1/2 in Grains Capacity at 10 lb/cu ft Salt Dosage 67 000 Grains Capacity at 12 lb/cu ft Salt Dosage 71 000 Grains Capacity at 4 lb/cu ft Salt Dosage 37 000 Grains Capacity at 6 lb/cu ft Salt Dosage 50 000 Grains Capacity at 8 lb/cu ft Salt Dosage 61 000