I have an Autotrol 960 softener. When I had it 1st installed 8 years ago our water pressure drop 50%. I told the installer who stated that we had had some heavy rains and maybe our submersible pump had pumped in some sediment clogging the water line. I was young and took his word for it. After about 2 years pressure started coming back. Had a leak in one of my control valves this week, had the guy come out and replace and reload the resin tank. Guess what, water pressure dropped immediatley again. Is this a problem with the softener or the installer. If need be, water pressure is so ow, I will disconnect the softener and put it on Craig's List. Any suggestions on how to fix?