DPFS091 FTI Drum Pump Tube Exploded View Diagram Repair Parts Breakdown. Finish Thompson PFS-27-BTC FDA Compliant PF Series Stainless Steel Sealless, High Performance Barrel Pumps PDF Manual. Replacement Coupling Insert, Coupling Half, Motor, Bearing Assembly Kit, Lip Seal. Lock Washer, Screw, Intake Tube Assembly, O-Ring, Inner Tube, Shaft Sleeve, Bottom Bearing. Impeller Housing, Shaft, Impeller Assembly, Housing Cover.