This unit replaces the Calsoft M water softener. Small, compact, the CalSoft Mini, metered water softener is designed to fit in all household situations. The energy saving units are suitable for all types of plumbing systems. Less salt and water are used as the metered, automatic unit only regenerates when necessary. Easy to operate electronics require little programming - simply adjust the water hardness level if needed. This durable water softener also features a stylish cabinet and hood, producing an endless supply of softened water. This softener includes a quick connect bypass designed for ultimate convenience for the installer, making the water softener installation quicker and easier. This bypass features quick release fittings to adapt 3/4" or 1" inlet and outlet. .