Barnes SE521AU, Part #096756, 1/2HP, 230V, Automatic Sewage Pump with 2″ Discharge Barnes SE521AU IOM Barnes engineered sewage ejectors pumps are available in 1.5″,2″ & 3″ discharge, for residential and light commercial wastewater applications. Heavy duty cast iron construction Rugged, oil filled NEMA motors Integral mechanical float switch 15′ cord