My son bought a house with a Mark 89 softener. The house was a repo so the softener sat unused on bypass for quite a while. The brine tank was filled with what looked like rock salt so we dipped it out and completely cleaned the tank,salt table and float assembly. When we cycle it everything seems to work all the way until the final brine fill cycle. It starts and has a good stream of water through the brine hose and shuts off after maybe 2 seconds and doesn't shoot anymore water. I know this because I unscrewed the white line nut off of the top of the float assembly and tried to run the fill cycle, and to rule out the float. Like I said everything else seems to work fine it pulls water from tank just fine but doesn't fill. Any advise would be greatly appreciated both by myself and my son and daughter in law