Unpack the washer and dryer from the boxes and move them close to the final installation spot. Set the washer about three feet away and the dryer on the other side of the washer to give yourself space to work. Don't forget to remove the shipping base from the bottom of the washer and pull out the packing material inside the lid. Grip the electrical plug on the back of the washer and pull it from the holder.
Slide the clamp that came with the drain hose over the end with the "L" bend then slide the end over the drain pipe on the back of the washer. Tighten the clamp by squeezing it with the pliers. Feed the "U" end of the drain hose into the drain pipe located next to the water source for the washer. Usually the drain pipe is a plastic pipe in the floor or the wall just behind the washer. Occasionally the washer will drain into a utility sink in the laundry room. If that's the case, hook the "U" bend of the drain hose over the side of the sink.
Connect the water hoses from the back of the washer to the water valves in your laundry room. Tighten the hoses so they won't leak, but don't over-tighten them or it may be difficult to uninstall later. Turn on each valve to ensure that water runs through the hoses; put the other end of the hose into a bucket; turn off the valves. Note which hose is hot and which is cold. Connect the hot hose to the hot inlet on the back of the washer and the cold to the cold. Turn the valves back on. Look for leaks. Tighten the nozzles with pliers until the leaks stop.
Place the level on the back-center of the washer and check for levelness. Use a wrench to turn the nuts on the feet of the washer until it is level. Have an assistant hold the washer up while you tighten the nuts.
Clean and dry the top of the washer. Take the paper off one of the stacking kit rails to expose the sticky tape. Stick it to the top-left corner of the washer. Screw the bracket in place on the back of the washer. Repeat for the other rail on the right side. Hold the front rail until later.
Lift the dryer with your assistant so it sits on top of the washer. Line up the feet of the dryer with the installed stacking rails. Slide the front rail into place between the washer and dryer and screw it to the side rails.
Plug the dryer into the outlet. If you have a gas dryer the plug will go into a standard 120 volt (V) outlet. If you have an electric dryer wire the cord with the plug that matches your 220V outlet to the terminal on the back of the dryer; 4-wire systems are typical for newer homes. Loosen the screws and connect the green or bare wire to the green, ground terminal then tighten the screw. Loosen the screw for the 3-terminal center block. Attach the white wire from the cord and the green wire with yellow stripes from the dryer to the center post of the block. Connect the two remaining wires to the outer posts and tighten the screw. Three-wire plugs may still be used in older homes. Connect the green wire with the yellow stripe from the dryer to the ground terminal with the green screw. Connect the white wire from the cord to the center post of the silver terminal and the other wires to the outside posts. Tighten the screws.
Connect the gas hose for a gas-heated dryer. Use a new 3/8-inch connector. Put thread sealing tape on the threads of the connectors before you tighten the hose to the gas line of your house and the gas input on the dryer. Once the hose is tight, open the gas shutoff valve. Check for leaks at either end of the connection with a bit of soapy water sprayed around the fitting. Leaks will cause bubbles in the soap to form.
Slide the washer and dryer together back into place. You and your assistant should each place one hand on the washer and one on the dryer and push both at the same time.