The answer to 'water softener replacement frequency' is that most water softeners need to be replaced every 10-15 years, depending on usage and water quality. Water softeners use ion exchange resin beads to remove minerals from hard water, and over time these beads become depleted and less effective. Replacing the softener or just the resin tank can restore the system's performance and extend its lifespan.
It's a good idea to have a professional plumber inspect your water softener every 5-7 years to check the resin beads and other components. They can recommend when it's time to replace the entire unit or just refill the resin tank. Regular maintenance and timely replacement will ensure your water softener continues working efficiently to protect your plumbing and appliances from hard water damage.