Step 2 · Disconnect Plumbing Lines
Under the sink, place a small bucket to catch water from the hoses. First, disconnect the drain hose, which is typically connected to a nipple on the garbage disposal or a wye-tailpiece on the sink drain. Use a flathead screwdriver or nut driver to loosen the hose clamp, then pull the hose off the nipple. Next, disconnect the water supply line. Use an adjustable wrench to loosen the compression nut connecting the supply line to the hot water shutoff valve. Have towels ready as water will drain from the line. Finally, disconnect the other end of the supply line from the dishwasher's inlet valve, which is usually at the front, behind a lower access panel.