Self-Priming Pumps

Cornell’s clear liquid pumps are known around the world as the most durable, most reliable, highest efficient pumps in the industry. They can be found in a variety of applications in the Agricultural, Industrial, and Municipal markets and are available in Close-Coupled, SAE Engine Mounted, Horizontal, and Vertical Configurations. The unique pushed-out rectangular design features of the Cornell frame will let you know it is Cornell pump.

Features & Benefits


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.

Model Discharge Suction Solids Handling Data Sheet
3STX 3" 3" 2.5" Data Sheet
4STX 4" 4" 3" Data Sheet
6STX 6" 6" 3" Data Sheet
8STX 8" 8" 3" Data Sheet


The STH Series design takes high-head Self-Priming Pumps to the next level; hitting heads 20% higher than our competition. The STH design runs at a slower RPM, while providing larger shafts and bearings to support the high head hydraulics. The result is a pump that outperforms the competition in both durability and performance. STH does not require a booster pump to hit heads of up to 253′ with up to 2,000 GPM.

Model Discharge Suction Solids Handling Data Sheet
2STH 2" 3" 1.5" Data Sheet
3STH 3" 4" 2.5" Data Sheet
4STH 4" 6" 3" Data Sheet