Twice during the cleaning cycle a loud squealing noise comes from the dishwasher. The noise lasts about thirty seconds approximately each time, and could be related to the machine filling or emptying the water in it. Someone suggested bearings? It started after we had a new sink and tap assembly installed and the connections were changed for the dishwasher. Any ideas would be appreciated, thanks. 
Double check everything what was changed. Something was done wrong there.
Gene.