FLYGT GRINDER PUMPS. Non-clogging and built for tough challenges. Flygt grinder pumps handle capacities of up to 15 l/s (250 gpm) with motors from 1.5 to 10.9 kW (2 hp to 15 hP). These hardworking, heavy-duty grinders are ideal for handling your toughest waste liquids in residential and commercial applications. Case Studies & White Papers.