“Flushable” materials cause serious problems for municipal pumping stations, as the materials clog pumps and cost a lot in repairs and downtime. The Salmon Creek Wastewater Treatment Plant in Clark County, Washington, saved hundreds of dollars a day using Cornell Cutter-Auger pumps to virtually eliminate ragging problems and improve flow.

Cutters vs. Choppers: Choosing the Right Impeller for Modern Wastewater Challenges
As wastewater compositions evolve—with flushable wipes, fibrous materials, and grease-laden solids now common—traditional non-clog pumps are increasingly unable to cope. Municipalities and industrial users face a critical choice: should they specify a cutter or chopper impeller for their toughest pumping applications?