but by removing the "O" ring adapter from the unit's interior

Diameter: 1 Inch

which can only be opened with the unit's included key

UltraTech Spill Deck P8 System - (2) 4-Drum Modules - 1074

Nidec US Motors H32T2BC Inverter Hostile Duty Motor, 1-1/2 HP, 3-Phase, 3600-1800 RPM, 230, 460V, 145TC Frame Advocate Lavatory Sinks but by removing the "O"Features: 40 C ambient, 10: 1 speed range with constant torque (6 60 Hz), Cast iron end bells Item: Hazardous Location Motor, Motor Type: 3 Phase, HP: 1 1 2, Nameplate RPM: 3600 1800, Voltage: 230 460, Frame: 145TC, Enclosure: Totally Enclosed, Rotation: CW CCW, Hz: 60, Phase: 3, Service Factor: 1. 15, Insulation Class: F, Bearings: Ball, Base: Rigid, Shaft Type: Key, Shaft Number: 1, Shaft Length: 2. 31", Shaft Height: 3. 5", Shaft Dia.: 0. 875", "C"