The STX series Cornell’s standard self-primers are a premium efficiency wet prime pump, that after the initial filling, will re-prime in operation. STX series, in 2” to 10”, are designed to work as a drop-in replacement for other self-priming pumps. Cornell pumps feature a number of advantages over other self-primers though, including Cycloseal®, heavy-duty ductile iron castings, oversized steel shafts, double-lip seals for bearing protection, and efficiencies up to 8% higher than competitors.