How to Add Salt to a Water Softener. A water softener system filters minerals that cause hard water. This process is accomplished by filtering the water through salt in the brine tank of the water softener. The salt acts like a sponge and holds the metals (for example, calcium, iron and magnesium concentrates) and renders the water "soft." Salt must be added regularly to the water softener unit in the saltkeeper.

Step 1

Keep the salt level of your water softener at half-full in order to have consistent performance. The more water you use, the more to add salt. Check the saltkeeper at least every 30 days.

Step 2

Check the water level in the unit to make sure there is enough salt to dissolve and create brine. Inspect the float mechanism. Verify that it's working properly to allow water to enter the tank as necessary.

Step 3

Use a special filter when the water has a particularly high level of iron. Iron-fighting additives are effective in water that contains 2 part per million (ppm)iron or less. High iron levels require additional products or an iron filter.

Step 4

Clean out the brine tank before adding salt. This is particularly important when using salt that is high in water-insoluble matter.

Step 5

Break up any "bridging" or "mushing" masses that have formed before adding new salt. This condition is usually prevented by reducing half the amount of salt added at any one time. Use a stick to break up masses of salt or contact a service to do a complete tank clean out.