GB50 SCHIER 50 GPM Grease Interceptor 4" Plain Inlet/outlet 249 lbs grease capacity . Interceptor flow rate shall be 50 GPM or 75 GPM. Interceptor grease capacity shall be 439.5 lbs. Cover shall provide water/gas-tight seal and have minimum 16,000 lbs. load capacity. Indoor/Outdoor Rated Installation