Turn off all the water-using appliances and pipelines
First, turn off all the water appliances like water coolers, showers, washing machines, sprinkler irrigation system and sinks. Check out the water meter. There is a leak indicator in the water meter, which will indicate if the water is leaking out.
The leak indicator is a triangle-shaped silver (or sometimes red) disc, which keeps spinning if there is a leak in your pipelines inside your house. Turn off the shut-off valve, which is usually located near your water meter. If the leak indicator still spins, slow or fast, after having turned off all the water-using appliances, you should know that you have detected a leak.
Use hose clamp
Once the leak has been found, you can now do some repair work. Wrap the damaged place/spot with a rubber pad and an electrical tape. Electrical tape works best in small leaks. For municipal leaks that are not so big and can be repaired without resorting to a professional help, you can use a hose clamp.
Hose clamp is like a pipe clamp, but is designed to fix smaller leaks. Use a rubber pad on the damaged spot and then screw the hose clamp securely.
Use pipe clamp
Municipal leaks are usually big and they often require some extra tools and remedies. A pipe clamp will come in handy in this regard. Buy a pipe clamp according to the size of the affected pipeline. Make sure the area where leakage has occurred is clean and free of dust and sand.
Wrap the leak with a rubber pad (which can be easily found at stores dealing in plumbing tools), and screw the pipe clamp tightly and securely. This method is best in large water leaks.