How to Run a Hot Water Line for a Dishwasher

Find the hot water shutoff valve under the kitchen sink. Turn the handle or the knob on the shutoff valve completely clockwise to stop the water supply.

Grasp the shutoff valve firmly with a pair of slip-joint pliers and hold it steady. Use an adjustable wrench to loosen the fitting at the end of the hot water supply hose by turning it counterclockwise. Remove the fitting completely by hand once it is loose enough.

Wrap the threads on the shutoff valve clockwise with Teflon tape to help seal the connection. Connect a dual shutoff adapter to the shutoff valve where you just removed the hot water supply hose. Thread on the adapter by hand and tighten it using an adjustable wrench. Apply Teflon tape to each of the two fittings on the adapter as you did previously.

Connect the faucet's hot water supply hose to one of the fittings on the adapter by threading it on by hand clockwise. Tighten the hose fitting using an adjustable wrench and slip-joint pliers as you did when you removed it. Connect one end of the dishwasher supply hose to the other fitting on the adapter using the method you used when you connected the faucet's hot water supply hose. Stick the other end of the dishwasher's supply hose through the hole in the cabinet sidewall where the dishwasher is.

Remove the dishwasher's kick plate on the bottom front of the unit. Use a standard or Phillips bit on a multi-screwdriver or the nut driver function, depending on the type of fastener used to secure the kick plate.

Pull the end of the dishwasher supply hose that you connected to the shutoff valve adapter toward the front of the dishwasher where the inlet valve is. Wrap the threads of the inlet valve with Teflon tape clockwise. Thread the fitting on the end of the supply hose to the inlet valve by hand to ensure it does not become cross-threaded. Tighten the fitting using an adjustable wrench. Replace the kick plate and restore the water supply.