I know that I have a shallow well we have had this problem since we have been here about 5 years. I have pressure in my house and I have really good pressure from my hose but when I turn my hose on the pressure is awesome for about 5 minutes then goes to very little and when I turn the hose off and there is nothing else on or running in the house it seems like it takes longer than it should for the pump to shut of. It will not even run a low pressure water sprinkler what could this be