You are here: Home>Impeller Material And Usage>Flexible Impeller Pumps Flexible Impeller Pumps Flexible Impeller Pumps Flexible Impeller pumps provide an efficient solution to most raw water pumping needs. The pumps are self-priming and can pass fairly large solids without clogging or damaging the pumps. Designed for a number of applications on boards. Above information from Johnson Pumps. Previous: Johnson FIP DC Pumps for bilge Next: How to inspection the flexible