The Zoeller MPN 267-0001 represents specialized sewage handling technology designed explicitly for residential and commercial basement applications requiring reliable 2-inch solid passage capabilities. This half-horsepower submersible pump delivers 128 gallons per minute maximum flow through its engineered plastic vortex impeller system, specifically addressing sewage ejector installations where conventional sump pump designs prove inadequate. Manufactured with ASTM Class 25 cast iron housing construction, this Waste-Mate series model operates continuously submerged in sewage basins, effluent tanks, and elevator pit dewatering applications. The 267-0001's distinctive mechanical float switch assembly controls automatic pump activation, eliminating electronic components vulnerable to sewage environment deterioration while maintaining precise water level management across varied installation depths. Measuring 14.28 inches in height with an 11.21875-inch length and 13.0625-inch width footprint, this specific pump configuration fits standard residential sewage basins without requiring specialized excavation modifications. The integrated 2-inch NPT discharge connection accommodates direct piping to municipal sewage systems or septic tanks, handling spherical solids up to two inches in diameter through its non-clogging impeller geometry. Operating on single-phase 115-volt electrical supply drawing 9.4 amperes, the 267-0001 delivers maximum 20-foot vertical head lift with 10-foot power cord standard length, providing installation flexibility across basement configurations without immediate junction box requirements. ASTM Class 25 Cast Iron Housing Construction & Corrosion-Resistant Coating Technology The 267-0001 employs precision-cast iron switch case and pump housing manufactured to ASTM Class 25 metallurgical specifications, providing superior structural integrity against sewage environment chemical exposure. Unlike thermoplastic housing alternatives common in residential sump pumps, this cast iron construction maintains dimensional stability under continuous 150 PSI maximum pressure conditions typical in sewage ejector discharge scenarios. The molecular density of Class 25 cast iron creates inherent resistance to hydrogen sulfide corrosion, methane gas exposure, and bacterial biofilm deterioration that progressively weaken polymer housings in long-term sewage contact. Factory-applied powder-coated epoxy finish on all cast iron surfaces establishes multi-layer protection against electrochemical corrosion in groundwater and sewage environments. This coating process electrostatically bonds epoxy particles to cast iron substrate at temperatures exceeding 400 degrees Fahrenheit, creating molecular fusion that prevents coating delamination under hydrostatic pressure cycling. The specific epoxy formulation used on model 267-0001 components demonstrates exceptional resistance to sewage pH variations between 6.0 and 9.5, maintaining coating adhesion where conventional paint finishes experience rapid degradation. The cast iron base plate geometry of this model distributes pump weight across 13.0625-inch width dimension, preventing basin floor penetration in cured concrete installations while maintaining stability during high-flow discharge events. This weight distribution becomes critical in sewage ejector applications where accumulated solids create uneven loading conditions potentially causing pump tilting with lighter aluminum or plastic base designs. The 267-0001's cast iron construction ensures the pump remains vertically oriented throughout its operational lifespan, preventing float switch malfunction caused by pump body displacement. Engineered Plastic Vortex Impeller with Strategic Metal Insert Reinforcement The 267-0001 utilizes an engineered thermoplastic impeller featuring precision-molded metal inserts that create centrifugal force patterns specifically designed to pass 2-inch spherical solids without blade contact. This vortex impeller geometry generates a swirling hydraulic pattern within the volute chamber, suspending solid materials in rotational flow while liquid components undergo
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