Why You Need to Service a Water Softener Before It Fails Knowing how to service a water softener can be the difference between a system that lasts 15–20 years and one that breaks down in under a decade. Here's a quick overview of what the full process involves: How to Service a Water Softener in 5 Steps: Check salt levels — Inspect monthly, refill to half-full, and break up any salt bridges or mushing Clean the brine tank — Scrub with mild dish soap and sanitize with diluted