To do a leak-check, turn off all water fixtures inside and outside your home (or building); check the position of the sweep hand and all the numbers on your water meter. Wait about 15 minutes and then check again. If the position of the sweep hand and the numbers have not changed, you don’t have any leaks. If there is a change, there is a leak somewhere on the property. Check your fixtures and pipes for leaks or call a plumber.