Specifications include, but are not limited to: A. SUCTION BELL - The suction bell assembly shall be manufactured from alloy steel, 3/16” for the 12” pump and ¼” thick for the 24” pump and conforming to ASTM A242, and shall have a maximum inlet diameter of 1.5 times the propeller diameter. The inlet bell shall be constructed to minimize vortex formation by maintaining equal pressures and velocities across the entrance. Bars shall be placed across the bell mouth to prevent entrance of large sticks, logs or debris. Inlet bell face shall be parallel to the water surface regardless of the angle of installation. B. PUMP BOWL - The propeller bowl assembly section shall be a single stage, shop assembled unit consisting of a venturi housing, stainless steel liner, propeller shaft, bearings and stainless steel propeller blades. The venturi housing shall be manufactured from 1/4” thick alloy steel conforming to ASTM A242 and shall be fitted with a machined, removable housing liner of 300 series stainless steel with a thickness of not less than 1/8" for the 12” pump and 3/16” for the 24” pump and a liner length of not less than the pitch length of the propeller. C. PROPELLER and SHAFT - The pump propeller blades shall be manufactured using ASTM A304 stainless steel. The propeller shall be balanced and secured firmly to the taper shaft with alignment key and locknut. The propeller shaft shall be machined from solid stainless steel bar stock and shall conform to ASME Code for transmission shafting to transmit full load torque and shall have additional safety factor for shock loads.