I'm Bill Elzey with Showplace Lawns. How to mend a leaky water hose, or leaky garden hose. The first thing that you will need to do, find you a really good, sharp pocket knife or a utility knife and cut the hose, one side or the other, away from where the damaged part of the....damage is. Then cut the other bad part of the hose off the other end. Take those two good ends, bring them together. Put the plastic fitting in both ends. Tighten it down with a screwdriver. Hook it back up to the faucet, and you're in business.