The Jabsco 1859-02092 Macerator Pump grinds waste into small particles for easy discharge. Fully enclosed with stainless steel shaft. Includes Run Dry Protection with self-priming Flexible Impeller and Stainless wearplate making this pump the ideal solution for emptying marine holding tanks. The unit is self-priming to a 5′ lift when wet. The macerator section grinds waste to 1/8″ or smaller. Flow rate is 12 GPM.