Step 2 · Disconnect Plumbing Connections
With the bucket in position, locate the dishwasher drain hose, which is typically a flexible, ribbed hose connected to a side inlet on the garbage disposal. Use a flathead screwdriver or pliers to loosen the hose clamp and carefully pull the hose off the disposal's inlet port. Tuck the hose upward to prevent water from siphoning out. Next, identify the large slip nuts connecting the P-trap assembly to the disposal's discharge pipe and the main drain line in the wall. Using channel-lock pliers, turn these nuts counter-clockwise to loosen and disconnect the P-trap. Some water will drain out, so be ready with your bucket.