Step 4 · Connect Water Supply Line
Carefully slide the new dishwasher partially into the cabinet opening. As you slide it in, feed the water supply line, the drain hose, and the electrical cable through the hole in the side of the cabinet leading to the sink base. Once the lines are through, connect the new braided steel water supply line. First, attach the end with the 90-degree fitting to the brass elbow you installed on the dishwasher. Hand-tighten this connection. Next, connect the other end of the supply line to the hot water shut-off valve under the sink. Hand-tighten this connection as well. Once both ends are hand-tight, use two adjustable wrenches—one to hold the valve or dishwasher elbow steady and one to tighten the compression nut—and give each connection a final quarter-turn. This two-wrench technique prevents stress on the pipes and fittings.