Most sink faucets should have a hot & cold shut-off valve underneath the sink that shuts the water off. In most cases, clockwise direction turns the water off and counterclockwise turns it on. “Righty-tighty, lefty-loosey.” Main shut off valves should be in readily accessible locations, however this in not always the case. To locate the main shut off valve to your home or business, locate the water meter – usually found near the street curb. Inside the meter box can often be found a shut-off valve for the main water supply.