The Little Giant MPN 506065 represents a fully-integrated water removal solution engineered specifically for above-floor drainage applications where conventional gravity-fed plumbing proves impractical.
This WRSC-6 model Drainosaur system delivers a complete package combining a one-third horsepower shaded pole motor, diaphragm-activated automatic operation, epoxy-protected cast iron pump housing, and a factory-assembled 3.5-gallon polypropylene basin measuring exactly 10.5 inches in height—all connected through an 8-foot power cord terminated with a standard 115-volt plug ready for immediate residential or light commercial basement installation.
Manufacturing precision defines this MPN 506065 utility pump through its pressure-sensitive diaphragm switch mechanism that activates between 4 and 7 inches of water accumulation and deactivates between 1 and 3 inches, eliminating the tangle-prone float assemblies found in competing sump pump designs.
The carbon ceramic shaft seal works in conjunction with dual bearing assemblies supporting the nylon impeller housed within the polypropylene volute, while the transparent polycarbonate cover allows visual monitoring of water levels and sediment accumulation without system disassembly.
This specific 506065 configuration achieves 46 gallons per minute flow capacity at 5-foot discharge head, reaching maximum vertical lift capabilities of 18 feet through its 1.5-inch female national pipe thread discharge connection, making it uniquely suited for laundry tray evacuation, wet bar sink drainage, dehumidifier condensate removal, air conditioner water disposal, water softener backwash handling, and utility sink applications where effluent must travel upward against gravity before entering municipal sewage lines or septic systems.
WRSC-6 Series Engineered Cast Iron Housing & Protective Epoxy Coating System For Extended Corrosion Resistance
The Little Giant 506065 employs precision-cast iron construction for its submersible pump housing, selected specifically for this WRSC-6 model due to cast iron's superior heat dissipation properties, mechanical strength characteristics, and dimensional stability under continuous water immersion conditions.
Cast iron's approximately 4 percent carbon content enables the material to develop a natural graphite surface layer when exposed to aqueous environments with pH values between 6 and 10, providing inherent corrosion resistance that self-regenerates during normal operation.
The factory-applied epoxy coating on this 506065 unit creates a chemical barrier against aggressive water chemistries, protecting the cast iron substrate from electrochemical attack, flow-accelerated corrosion, and premature degradation caused by varying mineral content in municipal water supplies or private well systems.
This dual-layer protection system—combining cast iron's metallurgical properties with polymeric surface treatment—extends operational lifespan significantly compared to aluminum or thermoplastic pump housings that lack similar thermal management capabilities.
The epoxy formulation bonds at the molecular level to the prepared cast iron surface, creating a continuous barrier resistant to chlorine exposure, sulfate contamination, and pH fluctuations common in basement plumbing applications.
The 506065's cast iron construction maintains structural integrity when handling intermittent liquid temperatures up to 125 degrees Fahrenheit, accommodating hot water discharge from washing machines, dishwashers, or water heater drainage without thermal shock damage that could crack inferior materials.
This specific housing design distributes motor-generated heat evenly throughout the submerged assembly, preventing localized hot spots that accelerate bearing wear and seal degradation in continuous-duty basement installations.
Mid-Level Diaphragm Switch Activation Technology Eliminating Float Mechanism Complications & Basement Space Constraints
This MPN 506065 utilizes a horizontally-oriented diaphragm pressure switch positioned at the mid-level of the pump assembly rather than vertical float switches or tethered activation mechanisms that require significant radial clearance within the basin.
The diaphragm switch operates through hydrostatic pressure principles, where rising water levels create increasing force against a flexible membrane housed within a sealed nylon enclosure attached directly to the pump body.
When water depth reaches the 4 to 7-inch activation threshold, accumulated pressure compresses the diaphragm sufficiently to close internal electrical contacts, energizing the 9-amp motor and initiating the pumping cycle.
As the 506065 evacuates water from the 3.5-gallon tank, reducing the level to between 1 and 3 inches, diminished hydrostatic pressure allows the diaphragm to return to its relaxed position, opening the contacts and deactivating the motor.
This pressure-actuated design specific to the WRSC-6 configuration eliminates the mechanical failure points associated with pivoting floats, tethered cables, and vertical rod assemblies that can bind against basin walls, become entangled with discharge piping, or fail due to pivot point corrosion.
The 506065's diaphragm switch occupies minimal space within the compact 10.5-inch tall assembly, making this particular model ideal for installation beneath laundry room utility sinks, inside bathroom vanity cabinets, or within crawlspace areas where vertical clearance limitations prevent the use of standard float-activated sump pumps.
The sealed diaphragm housing protects internal switching components from sediment infiltration, lint accumulation from laundry applications, and mineral deposit buildup that commonly disable exposed float mechanisms.
This activation technology functions reliably in the 506065's intended applications—removing relatively clean effluent from residential fixtures rather than handling sewage solids or construction site debris that would overwhelm the screened intake and compact impeller design.
Factory Pre-Assembled 3.5 Gallon IAPMO-Approved Polypropylene Basin Configuration With Integrated Discharge & Vent Connections
The Little Giant 506065 arrives as a complete pre-assembled system with the submersible pump installed inside the cylindrical polypropylene tank, eliminating field assembly requirements and ensuring proper component alignment for immediate above-floor installation.
The 3.5-gallon basin capacity provides sufficient volume for the diaphragm switch to operate through complete on-off cycles without short-cycling the motor, which would generate excessive heat and reduce service life.
This specific tank dimension—measuring 10.5 inches in total height—fits beneath standard laundry trays, bar sinks, and utility fixtures while maintaining the necessary water volume for efficient pump operation.
The basin has earned IAPMO approval, confirming that the tank construction, material composition, and structural integrity meet International Association of Plumbing and Mechanical Officials standards for residential plumbing system components.
The polypropylene tank material resists chemical attack from detergents, bleaches, fabric softeners, and cleaning agents commonly discharged through laundry applications, maintaining structural stability where metal tanks would corrode or deteriorate.
The 506065's transparent polycarbonate cover snaps securely onto the basin rim, incorporating molded channels that accept rubber grommets for watertight sealing around the 1.5-inch FNPT discharge connection and 2-inch FNPT vent opening.
This cover design allows visual inspection of water levels, sediment accumulation, and pump operation without disturbing the sealed system, while the removable filter trap positioned at the intake provides easy cleaning access when lint or debris reduces flow capacity.
The factory installation of pump components within the basin ensures correct positioning of the diaphragm switch relative to water levels, proper orientation of the discharge volute, and appropriate placement of the power cord through the cover grommet, eliminating common installation errors that reduce performance or cause premature failure in field-assembled competing systems.
One-Third Horsepower Shaded Pole Motor Design Delivering 46 GPM Flow Capacity Through 18-Foot Maximum Vertical Head Applications
This 506065 model incorporates a one-third horsepower shaded pole motor operating on standard 115-volt, 60-hertz residential electrical service, drawing 9 amperes during pumping cycles.
The shaded pole motor design provides reliable starting torque and consistent rotational speed without requiring capacitors or complex starting circuits that add failure points in wet environments.
This motor configuration operates efficiently within the pump's intended duty cycle—intermittent operation triggered by periodic water accumulation rather than continuous-duty applications requiring sustained pumping for hours.
The one-third horsepower rating delivers sufficient mechanical energy to rotate the nylon impeller at velocities necessary to achieve 46 gallons per minute flow rate when discharging against 5 feet of vertical head, or approximately 2,760 gallons per hour under optimal conditions.
The 506065's performance curve extends to 18-foot maximum head capability, though flow rate diminishes progressively as discharge height increases due to friction losses and gravitational resistance.
This vertical lift capacity accommodates typical basement-to-main-floor elevation differences in residential construction, allowing the pump to transfer water from below-grade laundry rooms or utility spaces to above-grade sewer connections or septic system entry points.
The motor housing remains submerged during operation, utilizing the surrounding water as a cooling medium that absorbs heat generated by electrical resistance and mechanical friction.
This submersible design maintains motor temperatures within acceptable operating ranges during extended pumping cycles, preventing thermal overload conditions that could trip internal protection circuits or damage winding insulation.
The 8-foot power cord length provides sufficient reach for placement of the 506065 system relative to standard wall outlets in utility rooms, basements, or under-sink installations without requiring extension cords that could create safety hazards or voltage drop issues affecting motor performance.
Screened Intake & Nylon Impeller Assembly Optimized For Clear Water Utility Applications Rather Than Solids-Handling Sewage Service
The MPN 506065 features a bottom-mounted screened intake surrounding the nylon impeller, designed specifically for pumping clear water applications including laundry discharge, sink drainage, dehumidifier condensate, air conditioner runoff, and water softener backwash.
The screen openings prevent large debris, lint particles, and solid objects from entering the impeller chamber where they could jam the rotating assembly or damage the volute housing.
This intake configuration performs effectively with effluent containing dissolved soils, suspended particles, and liquid wastes typical of residential utility fixtures, but the 506065 design explicitly excludes sewage solids handling, requiring a minimum particle size limit for reliable operation.
The nylon impeller material offers impact resistance, chemical compatibility with common household cleaning agents, and lightweight properties that reduce bearing loads during startup and sustained operation.
The polypropylene volute housing channels water flow from the impeller discharge to the 1.5-inch FNPT connection, maintaining flow velocity while minimizing turbulence that would reduce hydraulic efficiency.
This volute geometry specific to the WRSC-6 design optimizes performance for the pump's intended pressure range and flow characteristics, balancing between maximum flow rate at low heads and adequate pressure generation for 18-foot vertical lifts.
The combination of screened intake and nylon impeller makes the 506065 suitable for applications where water quality remains relatively clean—laundry water containing detergent and fabric fibers, bar sink drainage with food particles and grease, dehumidifier condensate with minimal suspended solids, and water softener regeneration brine with dissolved minerals.
For sewage applications containing toilet paper, sanitary products, or fecal matter, Little Giant offers alternative models with larger impeller passages, grinder mechanisms, or solids-handling capabilities that the 506065 specifically lacks.
Carbon Ceramic Shaft Seal & Dual Bearing Assembly Providing Leak-Proof Operation Under Continuous Submersion Conditions
This 506065 employs a carbon ceramic mechanical seal where the motor shaft penetrates the pump housing, creating a leak-proof barrier preventing water infiltration into the motor cavity.
The carbon ceramic seal faces maintain contact through spring pressure, with one face rotating with the shaft while the stationary face remains fixed to the housing.
This mechanical seal design accommodates the thermal expansion, shaft runout, and vibration inherent in submersible pump operation while maintaining sealing integrity that prevents water entry and motor damage.
The seal materials—carbon for the rotating face and ceramic for the stationary element—provide wear resistance and thermal stability superior to rubber seals or packing glands that would deteriorate rapidly under continuous submersion and intermittent operation cycles.
The 506065 incorporates upper and lower bearing assemblies supporting the motor shaft, distributing radial loads generated by impeller rotation and maintaining precise alignment between rotating and stationary components.
These bearings operate within the water-filled pump environment, requiring materials and designs that function effectively without traditional grease or oil lubrication that would contaminate the pumped water.
The bearing selection for this particular model balances load capacity, wear resistance, and corrosion resistance appropriate for the one-third horsepower motor's torque output and the intermittent duty cycle typical of residential utility applications.
The combination of mechanical seal and dual bearings enables the 506065 to operate reliably submerged in the 3.5-gallon basin, starting and stopping repeatedly as the diaphragm switch responds to water level changes, without developing leaks that would flood the motor cavity or bearing failures that would seize the impeller.
1.5-Inch Female NPT Discharge Connection Accommodating Standard PVC Schedule 40 Drainage Piping Systems Throughout Basement Installations
The Little Giant 506065 provides a 1.5-inch female national pipe thread discharge outlet integrated into the polycarbonate cover assembly, accepting standard threaded PVC adapters, brass nipples, or stainless steel fittings.
This connection size matches common residential drain pipe dimensions, facilitating integration with existing 1.5-inch or 2-inch Schedule 40 PVC drainage systems without requiring special reducers or adapters beyond standard plumbing fittings available at hardware stores.
The FNPT threads conform to ANSI/ASME B1.20.1 specifications for tapered pipe threads, ensuring proper engagement and sealing when mated with male NPT fittings and appropriate thread sealant.
The discharge positioning at the top of the basin cover allows horizontal or vertical piping orientation depending on the specific installation requirements—routing discharge lines horizontally along basement walls to existing drain connections or vertically through floor assemblies to upper-level drainage systems.
The 506065's 46-gallon-per-minute flow capacity at 5-foot head requires discharge piping sized appropriately to prevent friction losses that would reduce performance and increase back pressure on the pump.
A 1.5-inch pipe provides adequate flow area for the pump's output volume while maintaining water velocity sufficient to transport suspended solids and prevent sediment accumulation within horizontal pipe runs.
The discharge connection location above the pump impeller creates a siphon-breaking air gap that prevents backflow when the pump deactivates, though installations should include a separate check valve in the discharge line to prevent gravity drainage from elevated piping back into the basin between pumping cycles.
The 506065 system also incorporates a 2-inch FNPT vent connection in the cover, requiring attachment of a vent pipe extending above the flood level rim of the highest connected fixture, equalizing atmospheric pressure within the sealed basin and enabling proper diaphragm switch operation.
Removable Filter Trap & Transparent Cover Design Facilitating Maintenance Access Without System Disassembly Or Power Disconnection
The MPN 506065 integrates a removable filter trap accessible through the transparent polycarbonate cover, allowing cleaning and debris removal without disconnecting discharge piping or removing the pump from the basin.
This filter component captures lint, hair, food particles, and other debris before they reach the screened intake, reducing the frequency of deep cleaning required for the impeller and volute assembly.
The transparent cover material permits visual inspection of the filter trap's condition, water clarity, sediment accumulation on the basin floor, and pump operation during cycles, enabling proactive maintenance before performance degradation or component failure occurs.
Users can monitor the 506065 during operation to verify proper diaphragm switch activation levels, observe flow patterns indicating adequate discharge, and detect anomalies such as excessive vibration or unusual noise that could signal impending problems.
The filter trap design specific to this WRSC-6 model balances filtration effectiveness against flow restriction, incorporating opening sizes that capture problematic debris while maintaining sufficient flow area to prevent premature clogging during normal operation.
Regular filter cleaning—recommended quarterly for typical residential laundry applications or monthly for heavy-use installations—preserves the 506065's rated flow capacity and prevents motor strain caused by restricted intake.
The polycarbonate cover removes by releasing perimeter clips without tools, providing full access to the basin interior for filter servicing, sediment removal, or impeller inspection.
This maintenance-friendly design reduces the service time and technical knowledge required for routine upkeep, making the 506065 suitable for homeowner maintenance rather than requiring professional plumber intervention for basic cleaning procedures.
The sealed grommet passages for discharge connection and power cord maintain watertight integrity even after repeated cover removal and reinstallation, utilizing resilient rubber seals that compress between the polypropylene basin rim and polycarbonate cover edge.
Automatic Diaphragm Operation Eliminating Manual Monitoring Requirements For Unattended Basement Water Removal Throughout Extended Absences
The 506065's pressure-activated diaphragm switch provides fully automatic operation without external controls, timers, or manual intervention, making this system ideal for vacation homes, rental properties, or primary residences where homeowners cannot continuously monitor water accumulation.
The switch activation occurs automatically when water depth reaches the 4 to 7-inch threshold, initiating pumping regardless of time of day, day of week, or occupancy status.
This automatic operation protects basement spaces from flooding during washing machine discharge cycles, prevents overflow from continuously operating dehumidifiers, and manages air conditioner condensate accumulation throughout cooling seasons without requiring homeowner presence.
The 506065 deactivates automatically when water levels drop to the 1 to 3-inch range, preventing dry-running that would overheat the motor and damage the carbon ceramic seal.
The diaphragm switch enclosed in its sealed nylon housing operates reliably through thousands of activation cycles, lacking the mechanical wear points of float pivots, switch arms, or cable attachments that characterize competing activation technologies.
The 506065 continues functioning effectively even if sediment accumulates on the basin floor, lint coats the filter trap, or mineral deposits form on submerged surfaces, provided the diaphragm membrane itself remains unobstructed.
This reliability factor proves critical for installations where pump failure could result in basement flooding, property damage, mold growth, or structural deterioration of foundation walls and floor assemblies.
The 8-foot power cord terminates in a standard three-prong grounded plug compatible with 115-volt residential outlets, requiring only a nearby GFCI-protected receptacle for installation—no hardwiring, junction boxes, or electrical permit processes necessary for the 506065's deployment in typical residential utility room applications.
Compact 10.5-Inch Height Profile Enabling Above-Floor Installation Beneath Laundry Trays, Utility Sinks & Basement Bar Applications
This Little Giant 506065 measures exactly 10.5 inches in total assembled height from basin bottom to cover top, specifically engineered for above-floor installation beneath elevated fixtures where excavating a traditional sump pit proves impractical or impossible.
The compact vertical dimension permits placement under standard 36-inch height utility sinks, 34-inch bar sinks, and 40-inch laundry trays while maintaining adequate clearance for discharge piping connections and service access.
This above-floor mounting capability eliminates the excavation costs, concrete cutting, and structural modifications required for below-floor sump installations, making the 506065 particularly valuable in finished basements with concrete slabs, crawlspace applications with limited depth, or upper-floor utility room installations where cutting through structural members would compromise building integrity.
The cylindrical basin profile occupies minimal floor space—approximately 10 inches in diameter—allowing installation in tight corners, narrow utility closets, or behind appliances where larger rectangular basins would not fit.
The 506065's compact footprint combined with its complete pre-assembled configuration enables installation by homeowners or general contractors without specialized plumbing knowledge beyond basic PVC pipe joining techniques and standard electrical outlet connection.
The system weighs approximately 24 pounds when empty, manageable for single-person handling during installation, maintenance, or replacement procedures.
The above-floor positioning provides the additional advantage of maintaining the pump components above potential floor flooding—if a separate sump fails or groundwater enters through foundation cracks, the 506065 continues operating from its elevated position, providing backup water removal capability that below-floor pumps lack when completely submerged beyond their intended operating depth.
IAPMO Basin Approval & UL/CSA Electrical Listings Ensuring Code Compliance For Residential & Light Commercial Plumbing System Integration
The 506065's polypropylene basin carries International Association of Plumbing and Mechanical Officials approval, certifying that the tank construction, material safety, and structural integrity satisfy IAPMO standards for plumbing system components.
This IAPMO certification indicates third-party testing verified the basin's suitability for continuous water contact, resistance to common household chemicals, structural stability under operating pressures, and long-term durability in residential applications.
The basin approval facilitates inspection acceptance and building code compliance when installing the 506065 in jurisdictions adopting the Uniform Plumbing Code, which references IAPMO standards extensively throughout its requirements for drainage systems, fixture connections, and water handling equipment.
The complete 506065 system holds UL and CSA listings for electrical safety, confirming the motor construction, wiring methods, insulation systems, and grounding provisions meet United States and Canadian electrical safety standards.
These listings verify that the submersible pump design prevents electrical shock hazards during normal operation, protects against motor overheating through thermal protection devices, and incorporates appropriate grounding to prevent electrocution risks if insulation failure occurs.
The UL/CSA approval enables legal installation in both United States and Canadian residential and commercial buildings, satisfying electrical inspection requirements without requiring additional safety evaluations or special permit conditions.
These certifications—IAPMO for the basin and UL/CSA for electrical components—provide contractors, building inspectors, and property owners confidence that the 506065 meets recognized safety and performance standards, reducing installation challenges and ensuring insurance coverage validity for property protection applications.
Intermittent Duty Rating For Residential Utility Fixture Drainage Rather Than Continuous-Flow Groundwater Management Applications
The Little Giant 506065 carries an intermittent duty rating appropriate for periodic water accumulation from laundry machines, wet bar sinks, dehumidifiers, and air conditioners rather than continuous groundwater seepage requiring sustained pumping for hours.
Intermittent duty classification means the pump operates for limited durations—typically several minutes per cycle—followed by extended off periods allowing heat dissipation and motor cooling before the next activation.
This duty cycle matches the discharge patterns of washing machines that drain for 2-3 minutes per load, dishwashers releasing water in short bursts, and dehumidifiers cycling on and off based on humidity levels.
The 506065's thermal design, motor cooling requirements, and bearing lubrication system optimize performance for these intermittent activation patterns rather than the continuous immersion and constant rotation required for sump pumps handling chronic groundwater infiltration.
The one-third horsepower motor generates heat during operation that must dissipate through the submersed housing and into the surrounding water within the 3.5-gallon basin.
Extended continuous operation would exceed the thermal capacity of this cooling system, potentially tripping thermal overload protection or damaging motor windings through excessive temperature buildup.
For applications requiring continuous or near-continuous pumping—such as managing groundwater seepage in basements with active water tables, construction site dewatering, or flood water removal—Little Giant manufactures alternative models specifically rated for continuous duty with enhanced cooling systems and heavy-duty motor construction that the 506065 lacks.
Understanding the intermittent duty limitation proves critical for proper 506065 application—this model excels in utility drainage applications where water accumulates periodically but fails prematurely if subjected to continuous groundwater pumping demands beyond its design parameters.
Temperature Handling Capability Up To 125°F For Hot Water Appliance Discharge Including Washing Machine & Dishwasher Applications
The MPN 506065 handles intermittent liquid temperatures up to 125 degrees Fahrenheit, accommodating hot water discharge from residential washing machines, dishwashers, and utility sink applications without thermal damage to pump components or sealing systems.
This temperature rating reflects the combined thermal resistance of the nylon impeller material, polypropylene volute housing, carbon ceramic mechanical seal, epoxy-coated cast iron pump body, and polypropylene basin structure.
Modern washing machines discharge rinse water at temperatures reaching 120-130°F during hot water cycles, while dishwashers may release water exceeding 140°F during sanitizing rinses, making temperature tolerance a critical specification for utility pump applications.
The 506065's 125°F rating provides adequate margin for typical hot water appliance discharge while establishing clear limitations against boiler drainage, water heater flushing, or industrial process water that could exceed the pump's thermal capabilities.
The intermittent duty rating works in conjunction with the temperature specification—brief exposures to 125°F water during appliance discharge cycles allow cooling between activations, preventing cumulative thermal buildup that would occur with continuous hot water pumping.
The cast iron housing provides thermal conductivity that distributes heat throughout the submerged assembly, preventing localized hot spots at the impeller or seal interfaces.
The epoxy coating maintains adhesion and protective properties at elevated temperatures, unlike less expensive coating systems that would soften or delaminate when exposed to hot water.
The carbon ceramic seal materials maintain their mechanical properties and sealing effectiveness across the temperature range, avoiding the seal shrinkage or thermal degradation that would compromise leak resistance in pumps with rubber sealing elements.
Users planning 506065 installation for applications routinely generating water temperatures approaching or exceeding 125°F should implement temperature mixing provisions or select alternative pump models rated for higher thermal exposures to ensure reliable long-term performance.
Plumbing Supply And More provides the Little Giant MPN 506065 WRSC-6 submersible utility pump system as a premium solution for residential and light commercial above-floor water removal applications requiring reliable automatic operation, compact installation dimensions, and proven component durability backed by comprehensive IAPMO basin approval and UL/CSA electrical safety certifications.
