OMNIFilter OM40K-S-S06 Twin Tank Water Softener 40,000 grain water softener for homes with 3-5 people Enjoy spot-free dishes, sinks, showers, and a longer life for clothes and linens Reduces hardness, scale, iron, calcium and lime Includes, digital display, drain tubing, bypass valve and fittings Smart Reserve Technology - anticipates daily water usage and ensures optimum efficiency and dependability