says the enclosed impeller design of its H Series High Head Self-Priming Centrifugal Pumps
increases efficiency for the highest flows and pressures with the least amount of horsepower. Pressures in the case and volute are balanced during pumping to prevent loss of capacity from recirculation. All of the metal parts in the mechanical shaft seal are stainless, and the stationary seal face is made of optimum-grade ceramic that is resiliently mounted. The H Series is available in 3-, 5-, 7-1/2-, 10-, 15- and 20-horsepower models with heads to 260 feet and flow rates to 325 gpm.