A leaking hose can waste hundreds of gallons of water every year. The leak will never get smaller, it will only get bigger. Tape works for a while, but the leak is still there. Other than buying a new hose, there is a simple way to repair that leak. The cost of repairing the leak in a hose is a fraction of the cost of replacing the entire length of hose, especially if the hose is long.
Find the leaking section of the hose. The easiest way to do this is to lay the hose out flat and turn the water on. Look for the leak. Turn the water off once you've found the leak.
Cut the section of leaking hose out with the razor knife. Remove 1 inch of hose on either side of the leak. This will remove any internal damage from the leak.
Remove the clamps from the end of the hose splice kit. You don't have to remove the screws fully to take the clamps off.
Slide a clamp on each end of the cut hose.
Press the cut ends of hose onto the splice coupling. Some hose may require a small slice lengthwise to start the hose on the fitting.
Slide the clamps over the ends of the hose and tighten.
Turn the water back on to make sure the leak is gone.