Close-coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is either directly attached to the stainless steel motor shaft or the impeller is mounted on a separate stainless steel shaft, which is counter bored on the outer end in order to slide over the carbon steel motor shaft. Ball or sleeve bearings in the motor support the shaft. Model 406M has a mechanical seal. Impellers are made of Neoprene rubber, Nitrile impellers are available on request. Flexible blades on the periphery of the impeller provide the pumping action. While the impeller rotates, the liquid between the blades is continuously squeezed out into the discharge port by a cam located inside the pumping chamber. The flow may be throttled or shut off for a short period without the need of a relief valve. FEATURESAll Bronze ConstructionLarge Vent Openings Separate Pump and MotorStainless Steel Motor ShaftMotor Shaft Slinger Protects Motor BearingsRubber Motor Grommets for Noise IsolationMacerator Wheel and Impeller Easily ReplacedRemovable BasePUMP INLET: 2 slip-on hose section with 1 NPT standard pipe male thread. All suction connections must be air tight to achieve lift. PUMP OUTLET: 34 external garden hose thread with 38 NPT standard pipe thread internal. MACERATOR: Will handle sewage, waste, toilet paper, cigarettes, cigars and all maceratable solids of approximately 1 inch size. Will not handle fruit pits, hard plastic utensils, prophylactics, cloth or fabric sanitary napkins. MOTOR: 12 volt D.C. high torque, 18 amps. Intermittent duty cycle. Do not run pump dry. 24V and 32V also available.