All of my faucets are slow. They start out with a burst of full pressure for about 1-2 seconds then start slowing down to a slow stream of water. I have an old water softener that has been inoperable for around 20 years. I have been told that because it has not been put on bypass (didn't know I had to do that) that some "silt" from it could be in the lines, causing the problem. Where do I go from here?