First, get to know what’s in your home.

Already have a water softener?

1. Find the model and its manual.

   Record the manufacturer, model, and serial number from the equipment label. Keep the control-valve model separate from the complete-system model when both are listed. Look for the matching manual on the manufacturer’s website.

2. Record before changing.

   Note the time shown on the controller, displayed hardness setting, visible error messages, and the last observed regeneration. Record when you look at the salt tank, since an observation without timing can be hard to interpret.

3. Know where your water data comes from.

   Keep a dated hardness result and its unit. A regional map cannot tell you the hardness at your tap. The USGS hardness overview explains why household information should come from a local source.

Planning a purchase?

Work out how much water will actually pass through the softener and obtain an incoming-water hardness reading. Keep outdoor bypass use separate. Then calculate a target and ask the supplier to show its rated working capacity at the stated salt dose.

Work through your capacity needs

Trying to understand a problem?

Start by writing down what changed, when it started, whether the issue affects one tap or the whole house, and any displayed error code. Use your exact model’s troubleshooting section. Avoid assuming another brand’s tank water level or regeneration sequence applies to yours.

If a manual calls for service, share these observations with the manufacturer or your service provider. This site’s planning calculators do not diagnose a fault or replace model-specific service instructions.

Want to understand running costs?

Gather salt receipts and the water and sewer rates on your bill. A purchase receipt measures what you bought, which may differ from the salt consumed during that period. Keep maintenance and initial installation separate.