The homeowner sets the system switches when recharging is necessary. The system completes the process without need for further attention. A second tank is required for brine solution. All steps of the recharging process are controlled by a timing mechanism that the homeowner sets, based on water usage. Some models can measure water usage or remaining softening capacity and recharge themselves only when needed.
Most water softeners have a fully automatic recharging feature.
These softeners also require a second tank for the brine solution. Water softeners can be installed in various ways. The most typical installation is to soften hot and cold water, but to bypass outside water lines. This gives the fullest benefit from soft water. The increased sodium in softened water is a concern of individuals on a sodium-restricted diet.