I had a new toilet installed (Vitra brand) professionally about 3 weeks ago. Worked fine until this morning when it was flushed it really sounded like a motor was running.. very loud... coming from the tank. The toilet takes little water.. (in the bowl and fills about half in the tank) Has lots of force in the flush... is this something we're going to have to live with or should I call the plumber back to fix something? Thanks