The Little Giant 506055 combines a submersible pump with dedicated basin in one seamless water removal solution. This MPN 506055 model delivers 46 gallons per minute at five feet of head through its specifically engineered 1/3 horsepower shaded pole motor. Unlike modular systems requiring separate component assembly, the 506055 arrives as a pre-configured unit where the cast iron pump housing and polypropylene basin work as unified water management infrastructure. The integrated approach eliminates compatibility concerns between pump and tank—every connection dimension, from the 1 1/2-inch FNPT side intake port to the strategically positioned top discharge outlet, has been precisely calibrated for optimal flow dynamics specific to this configuration. Contractors and homeowners benefit from knowing their submersible pump and reservoir were engineered together rather than retrofitted after purchase. Heavy-Duty Cast Iron Pump Housing Construction with Continuous-Duty 1/3 HP Shaded Pole Motor & Sustained Performance Specifications This 506055 submersible pump's cast iron construction withstands sustained operational demands in demanding plumbing applications. The housing material selection matters considerably—cast iron dissipates heat more effectively than aluminum alternatives, allowing the 1/3 HP motor to maintain consistent performance through extended water removal cycles. Drawing 9 amps at full load operation with 115-volt household current, the motor produces approximately 720 watts of power delivery. The shaded pole motor design operates continuously without thermal cycling concerns that affect pump longevity, making the 506055 suitable for basement sewage systems, dehumidifier drainage lines, laundry tray overflow protection, and commercial plumbing installations where reliability supersedes intermittent-duty considerations. The pump's 18-foot maximum head capability means it can elevate water vertically higher than standard utility pumps, addressing installation scenarios where drainage points sit below discharge locations. Corrosion-Resistant Polypropylene Basin Technology with Five-Gallon Accumulation Capacity & Chemical Resistance for Effluent Environments The 506055's five-gallon reservoir constructed from polypropylene delivers lightweight corrosion resistance for diverse water chemistry environments. This basin material selection prevents rust formation from sewage contact, effluent exposure, or extended water holding periods—problems that plague steel alternatives requiring protective coatings. The five-gallon capacity balances accumulation volume with floor space requirements typical in residential bathrooms, basements, and under-sink applications. The basin includes 2-inch FNPT top vent port accommodating standard plumbing adapters, allowing pressure equalization during pump discharge cycles. This ventilation feature prevents vacuum formation that would restrict water flow or damage basin integrity during extended operation. The polypropylene construction remains non-brittle in temperature variations between 32 and 104 degrees Fahrenheit, matching residential climate conditions across geographic regions. Automatic Diaphragm Switch Activation with Pressure-Based Water Level Sensing & Float-Free Operation Technology The 506055 incorporates an integral diaphragm pressure switch eliminating float mechanism complexities found in competing sump pump systems. This activation method detects water level changes through pressure sensing rather than mechanical float movement, meaning the pump starts automatically when water reaches predetermined height thresholds. The pressure-based approach avoids float stick situations that prevent automatic shut-off in systems handling sediment-laden effluent or grease-contaminated sewage water. The diaphragm remains sealed within the pump housing, protecting sensing components from environmental exposure that causes premature failure.
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