Removed old pump by removing the two hoses. The smaller hose had a single-use metal hose crimp that needed to be destroyed in order to remove it. You will need to replace that with another spring-type hose clamp. Video shows exactly what you need to do otherwise. Remember, to test the drain, you can turn unit on and move the selector to rinse/drain. Then turn off the extra rinse option by pressing the extra rinse button.