Water softeners help remove minerals and other unwanted materials from your water supply before the water reaches the rest of the house. The softeners salt, "softens" hard water and reduces mineral buildup on showerheads and other appliances. Since water softeners are installed at the beginning of the plumbing system they can cause low water pressure. Identify the problem First, verify that the water softener is actually causing the lost water pressure. Turn the valve on top of the softener that is labeled "bypass," ( Which will allow water to flow straight through the pipes without passing through the softener .) Turn on a faucet after turning the bypass valve to see if the performance has improved. If it has, the water softener is the cause of the low water pressure; if not, the problem is likely located somewhere else, eg: water pressure regulating valve, rusty piping, supply, hidden leak, etc. All water softeners contain a sediment filter that traps dirt and deb...