Turn off the water.
Cut the PVC pipe. Use a pipe cutter to cut the portion of the pipe that is leaking.
Place the neoprene coupler on the pipe. Where you've cut the PVC pipe, place the rubber sleeve on the pipe, then the metal clamps.
Tighten the screws of the neoprene coupler.
Turn off the water.
Clean the leaking part of the PVC pipe. You want the pipe as dry and free of debris as possible. You may want to use a heat gun to evaporate the moisture.
Rough up the PVC pipe. Use sandpaper to create rough, uneven marks on the area. You can also use rubbing alcohol to eliminate any oils or dirt from the pipe.
Apply adhesive. Place plumbing adhesive onto the joint. Cover at least 1/4 inch of each side of the PVC joint with the thick layer of glue. Push as much of the glue inside the hole as you can.
Wait six to 12 hours. Turn the water back on after the glue dries.