19220-ZV1-A00 Impeller Housing - Overview. The 19220-ZV1-A00 Impeller Housing is a critical component of the Honda marine engine water pump system. It serves as the protective casing for the impeller, a key element that directs water flow to ensure efficient cooling of the engine. This housing plays an essential role in maintaining the reliability and performance of your marine engine by keeping the water pump functioning at optimal levels. Designed to integrate seamlessly with existing hardware