Evergreen series submersible pumps have different construction materials. The pumps have an outer wear bearing and a Stainless Steel Check Valve. All vital components of these pumps are designed for the best possible hydraulic efficiency. All bronze components are made of zinc-free bronze to provide corrosion resistance and withstand abrasion and wear caused by sand. The shaft made of SS 431 ensures long life of the pump. The pumps are of the multistage centrifugal type, which is firmly connected to the submersible electric motor operating submerged under the water surface. The built-in check valve prevents backflow and reduces the risk of water hammer. All installation dimensions of the pump comply with the NEMA standard.