My well is not producing as much water as normal. It has always had a 3 GPM flow restrictor on it since we have lived here, about sixteen years. The well is a 4 inch casing at 100 Ft. It was drilled many years ago, not sure when. Today I turned the pump on and could pump 12 gallon of water in about 4 minutes before it quit. I then waited about an hour and tried it again and it pumped less than a gallon before it quit. Before I give up on it I would like to try and remove the mud and anything else there might be from the bottom of the casing. I was wondering how to do it without pumping it through my new pump.