If you have a pipe leak in your home and have a hardware store near your house, then it's a good idea (and a cost efficient one) to fix the problem yourself. All that you'll need to get the job done is a basic knowledge of what items you'll need to remedy the situation and how to go about doing it. Rather than hiring a plumber to fix the small leaks that plague your home, why not turn a pipe leak into a DIY project.
What to do first - You'll want to see exactly where the pipe leak is and turn off the water going to that location from the valve. This valve is usually near the main pipe. After this is done, you should clean the pipe that is leaking using a rag and some sandpaper. This will not only let you see the leak a bit better, but will ensure that mold and debris build up doesn't block the pipe again later on.
Try tightening the joints - Sometimes the problem might not even be a pipe leak, but simply a loose joint. All that you need to do to fix this is use a wrench to tighten the bolts, and make sure to not use too much force, as this can damage the pipe. If it's a matter of a bolt or fitting being coroded, then you'll need to visit a hardware store to purchase a new one.
Use a sealant - There are a variety of sealants on the market today that can plug the pipe leak if it's small, and prevent water from dripping out. Epoxy paste is a great example of a sealant, and it should fix your problem within a matter of minutes. Also, though it's not a traditional sealant, tape might work, as well. Just make sure to apply these things to dry pipes, or else they won't work.
Use a clamp - You can also use a clamp, which goes over the pipe leak, in order to remedy the problem. You can purchase a pipe clamp at just about any hardware store, and it is easily applie by simply tightening the screws that hold the clamp in place on the pipe. Also, another option is rubbing a compound stick over the leak, which will seal it up.
If all else fails... - If your pipe leak is simply too large or none of the other sealing methods are working, then you're probably going to have to call in a plumber. A licensed plumber will have the tools and experience to fix the problem for you and will be able to get the job done quickly. Verify that the plumber you choose is licensed, and don't be afraid to ask for pricing in advance.