The answer to 'water softener overflowing' is that a water softener overflowing is typically caused by a clogged drain line, a problem with the control valve, or an issue with the water pressure. Symptoms may include water leaking from the softener, the softener running continuously, or the softener not regenerating properly.
Some common solutions include checking and unclogging the drain line, adjusting the control valve settings, or replacing worn-out parts. If the problem persists or you're unsure of the cause, it's best to call a professional plumber to diagnose and fix the issue.