STX SERIES Cornell has redesigned the popular self-priming line to have the best efficiencies in the industry. Combined with our patented-Cycloseal® back plate technology, the pumps are durable, powerful, and energy efficient. The STX Series design builds on our prominence in providing world class pumps, and allows the new STX to operate in extremely heavy duty situations, while increase efficiencies up to 8 percent better than other manufactures' average. Those efficiencies could translate into tens of thousands of dollars saved in fuel and maintenance expenses over the life of the pump. Specially designed removable rotating assembly allows the new Cornell piece to retrofit with other manufacturers' pumps. STH SERIES Cornell has designed a High Head Series of Self Priming Pumps to hit the Industries toughest design points. Combined with our patented-Cycloseal® back plate technology, the pump is durable, powerful, and energy efficient. The STH Series design takes the high head Self Priming Pumps to the next lever hitting heads 20% higher than our competition. The STH Design runs slower, while providing larger shafts and bearings to support the high head hydraulics. The result is a pump that out performs the competition in both durability and performance.