Adjustable on-off cycle allows homeowners to change the operating cycle to fit their application. Two pole switch provides positive on-off action for years of service. Overload protection to keep the motor from over-heating. Top suction strainer filters out debris before it can clog the pump. Open style impeller moves foreign particles through the pump without clogging. Stainless steel stub shaft or sleeve rotates in a bronze bushing for long life. Easy to install. UL listed. Two year warranty. 12 in minimum sump diameter; on-off levels adjustable. 1-1/4 in discharge.