We keep losing water pressure. Always when the water softner is on and other times when it's not. It drops down to 0 and we have to turn all water uses off and let it build back up. Also, we cannot use outside water (watering gardens or farm animals) and use inside water - we end up with no water available in house.

More details please! Age of house and material of pipes? Does your Keep pressure or does it start to drop? What's the cut off PSI on the control box? Any other information? Back to you, Tom