There is a shut-off in the meter manhole where your supply line takes off of the supply main. These take a more or less special tool to turn off. Your local supplier may not want you to have one, but I would suggest you get one anyway for emergency use. If your line broke before it got to valve in the house, you have no way to shut the water off, and Murphy's Law states that when that happens, it will be at night and on a holiday. I'd install a full flow ball valve. These are available with threads so you can adapt them to any kind of pipe using approprate adapters. They have a lever that requires only 1/4 turn for full off to full on.