If you live in a house or bungalow, the easiest way to stop the flow of water without having to search high and low for stop cocks and check valves is to go outside your property, locate the main water meter in the pavement, lift the lid and turn the handle a 1/4 turn. Turning the water off at the meter will mean your property will not have any water, however it is extremely quick to do as the water meter is usually always out the front of your property. You will need a flat head screwdriver to lift the lid to expose the water meter. (a butter knife could work if you don’t have any tools on hand)