Water Softener - Determining Your Water Hardness
Water hardness is determined by the grains per gallon (gpg) in your water. You can get grains per gallon of your water from a water analysis laboratory. If you are on a municipal city water supply, call you local water department for the water hardness. You can also contact an independent water analysis company, like Legend Technical Services: https://legend-group.com/.
Once you determine your water hardness, program your water softener following the directions in your Owner's manual. Download a copy of the Owner's Manual