The answer to 'why is my water softener low water pressure' is that a clogged or malfunctioning water softener is a common cause of low water pressure. Over time, the resin beads inside the softener can become fouled with minerals, reducing the water flow. Additionally, issues with the softener's control valve or other internal components can also restrict water pressure.
Some common symptoms of a water softener causing low pressure include: reduced flow from faucets and showerheads, longer refill times for appliances like washing machines, and an overall decrease in water pressure throughout the home. To resolve the issue, you may need to clean or regenerate the softener, replace the resin, or repair/replace the control valve.