For more help with this issue, see commercial floor drain overflows: causes and prevention, lift station and pump basics for commercial buildings, our emergency leak detection overview, and commercial leak detection emergencies.
Grease And Solids Blockages
Restaurant and food-prep drains clog on grease that cools and hardens downstream, while mop sinks catch solids that should never have entered the line. When the blockage sits past the last accessible drain, the whole system backs up through the lowest point — usually a floor drain far from the cause.