Jabsco Impeller Kit - 12 Blade - Neoprene - 3-

Neoprene is the most commonly used material and is suitable for use where only small amounts of oil or diesel fuel are present. Use nitrile impellers for bilge pumping, and for transfer duties where the water is heavily contaminated, for example by oil or diesel. Replace all impellers at least once every year, or sooner, depending on the engine duty. When the installation is correct, an impeller may last for several years, but it is always advisable to stick to a schedule of preventative, rather than corrective, maintenance.