Pumpmaster STA-112DS Stainless Steel Non-clog Sewage Pump for Septic Tank Evacuation with Semi-Open Impeller

Managing raw residential sewage and fibrous effluent is exceptionally efficient with the Pumpmaster STA-112DS submersible sewage cutter pump. Built as a heavy-duty wastewater utility for larger homes, small residential complexes, and light commercial properties, this unit is engineered to lift unscreened toilet waste and laundry graywater. The integrated mechanical float switch provides reliable automatic start-stop operation, enabling continuous level-controlled basin evacuation without requiring manual monitoring.

Hydraulic output is powered by a high-efficiency single-phase 240V electric motor with a rated power output of 0.75 kW. This robust power configuration achieves an outstanding maximum flow rate of 500 L/Min and produces a maximum vertical lift height of 12 m. Optimized for residential utility pits and septic collection sumps, the pump generates substantial delivery pressure to transfer dense sewage slurry over long distances to main sewers.

Liquid handling is optimized via an advanced single-vaned semi-open non-clog impeller coupled with an integrated high-speed macerating shredder assembly. This dual cutting mechanism actively chops fibrous wastes, hair, and soft solids down to a pumpable slurry before they enter the discharge line, minimizing blockages in downstream systems. The hydrodynamically balanced design of the impeller paths ensures smooth operation, reducing rotational wear and extending structural life.

Physical construction utilizes a marine-grade stainless steel motor casing for extreme durability in acidic sewage liquids. Motor protection is enhanced with a double mechanical seal system containing an oil barrier that blocks liquid ingress. Equipped with automatic thermal protection, the single-phase motor windings are safeguarded against overheating and mechanical overloads, ensuring dependable service in underground pits.

Features

• Integrated high-speed macerating mechanism with heat-treated cutting edges for rapid solid reduction.
• Automatic level-controlled float switch designed for plug-and-play septic collection station setup.
• Marine-grade stainless steel motor casing resisting chemical corrosion and physical impacts.
• Double mechanical seal configuration with an intermediate oil barrier protecting the motor core.
• Winding-integrated thermal overload protector safeguarding against electric spikes and motor locking.
• Hydrodynamically balanced single-vaned impeller minimizing shaft vibration and rotational friction.
• Rigid metal top carrying handle providing robust structural support during installation and recovery.