Davey D75M Cast Iron Manual Submersible Pump for Sump Emptying with Open Impeller

Managing significant groundwater ingress in sub-surface commercial structures requires a pumping solution that maintains constant pressure during peak influx events. The Davey D75M is a robust general-purpose pump developed to handle clean or slightly dirty grey water of neutral pH in cellars and pits. This manual unit provides the necessary hydraulic force for site dewatering, ensuring that property remains protected from water accumulation during heavy rainfall. By operating as a manual submersible, it allows operators total control over drainage pathways in factory environments.

Powered by a 0.75 kW single-phase motor, this model delivers reliable performance for high-head drainage tasks on a standard 240v supply. It generates a maximum flow rate of approximately 420 L/Min and reaches a maximum total head of 15 metres to satisfy demanding discharge requirements. The electrical configuration maintains a steady 7.5 Amps run current during typical service cycles, ensuring energy-efficient operation at a synchronous speed of 2850rpm. This performance profile ensures that septic disposal and water transfer are managed rapidly through the 50mm outlet port.

Hydraulic behavior is centered on an open centrifugal impeller configuration engineered to handle liquids containing up to ten percent soft solids in suspension without internal clogging. This specific cast iron design maintains high fluid velocity paths through the pump casing, preventing the accumulation of sediment that could otherwise compromise volumetric efficiency. By utilizing a centrifugal flow path, the unit minimizes internal friction and vibration, extending the functional life of the rotating assembly during prolonged operation. The impeller is optimized for liquids containing environmental debris typically found in domestic sumps.

Mechanical stability is achieved through a heavy-duty cast iron pump body and motor top paired with a corrosive-resistant 304 stainless steel motor shell. Longevity is anchored by a double mechanical shaft seal in an oil bath featuring hard-faced silicon carbide and ceramic surfaces for maximum wear resistance. An internal automatic resetting thermal overload prevents burnout during high-load operating conditions, while the 10-metre HO7RNF oil-resistant lead ensures a safe power connection. The architectural casting includes high-grade 304 stainless steel fasteners and an integrated handle for lasting structural integrity.

• Open centrifugal impeller design allows for the efficient passage of small soft solids in suspension.
• Heavy duty cast iron pump body provides a rigid and durable foundation for sub-surface operation.
• Corrosive resistant 304 stainless steel motor shell and strainer ensure lasting structural integrity.
• Double mechanical shaft seal in an oil bath offers enhanced motor protection and long service life.
• Automatic resetting thermal overload prevents motor damage during high-load operating conditions.
• HO7RNF oil resistant 10 metre power lead is designed for longevity in contaminated water.
• Silicon carbide and ceramic seal faces provide high resistance to wear from suspended particles.