The answer to 'what is water softener' is a device installed in a home's plumbing system to remove minerals like calcium and magnesium from the water. Water softeners work by using an ion exchange process to replace these minerals with sodium or potassium ions, resulting in 'soft' water that is gentler on skin, hair, and household appliances.
Water softeners are beneficial for homes with hard water, which can lead to mineral buildup, stained fixtures, and reduced efficiency of water heaters and other appliances. They require periodic regeneration to recharge the ion exchange resin, typically using salt or potassium chloride. Regular maintenance and monitoring of salt/potassium levels is important for ensuring the softener continues to work effectively.