Flexible rubber water pumps are self priming and will lift up to 20 feet when wet. Their positive-displacement pumping action prevents air-lock. They easily pass liquid, foam and air without difficulty (cannot run dry for over 30 seconds without damage. Its gentle pumping action easily handles shear sensitive liquids without emulsifying or foaming. Flexible impeller pumps can pass soft solids and will leave them undamaged when the pump is properly sized. They can also pass hard solids with minimum wear. The simple design of the flexible impeller pumps utilizes only three moving parts (impeller, seal, and shaft). A novice can even replace impellers in 15 minutes or less keeping downtime is to a minimum. It has compact dimensions compared to competitive pump designs