Davey D120GA Cast Iron Silicon Carbide Sealed Submersible Grinder Pump for Septic Effluent with Open Impeller

The Davey D120GA is a specialized automatic solution for black water management, combining a powerful 1.2 kW motor with the convenience of float-switch controlled operation. This model is engineered to address the environmental demands of residential pits where consistent, unattended water removal is required to prevent inundation. By shredding soft solids, textiles, and sanitary products into a fine slurry, the pump ensures that the discharge remains free-flowing through the entire pipe network. The heavy-duty cast iron construction provides the rigidity needed for long-term sub-surface deployment.

This automatic model achieves a maximum total head of 22.5 metres and a maximum flow rate of 180 L/Min on a standard 240v supply. It operates with a steady 10.0 Amps run current, providing the high starting torque characteristic of Davey's commercial-grade grinder series. The integrated preset length float switch activates the pump as waste levels rise, ensuring efficient energy use by only operating when necessary. This makes the D120GA ideal for septic effluent disposal in homes and small commercial sites.

Hydraulic efficiency is driven by a centrifugal open impeller and a high chromium steel grinding mechanism that handles solids in suspension. This design prevents the accumulation of sediment in the pump casing, maintaining high volumetric efficiency over thousands of operating cycles. The use of FCD 400 cast iron for the pump casing and impeller ensures the unit can withstand the abrasive nature of grey and black water. The 1 1/4" BSP F outlet size is perfectly matched to the shredding capacity for optimal discharge velocity.

Structural longevity is provided by 304 stainless steel motor components and nitrile rubber elastomers for superior chemical resistance in waste water. Motor protection is anchored by a double mechanical shaft seal in an oil bath, featuring a silicon carbide/ceramic seal on the pump side for maximum wear resistance. An internal automatic resetting thermal overload prevents burnout from electrical stress, while the 10-metre HO7RN-F lead ensures a safe industrial-grade connection. The architectural casting includes rubber-cushioned mounting feet for silent and stable operation.

FEATURES

• Preset length float switch enables fully automatic, unattended drainage and sump management.
• Powerful 1.2 kW motor and high chromium steel shredder ring process textiles into a slurry.
• Open centrifugal impeller configuration prevents clogging and supports high-head water transfer.
• Double mechanical shaft seal in an oil bath with premium SiC faces for superior motor insulation.
• Heavy-duty powder-coated cast iron body and 304 stainless steel motor shell for durability.
• HO7RN-F 10 metre oil-resistant power lead ensures a safe and rapid electrical deployment.
• Internal thermal overload protection prevents damage from overheating or electrical fluctuations.