Emergency stop valves

An emergency stop valve, or straight stop valve, is valve that does not change direction. They are usually installed before the water supply line (below) to toilets and faucets. Angle stops are to be shut off in case of an emergency or repair and are generally not designed for daily on and off usage. The difference between a straight stop and an angle stops is the angle stop changes direction by 90 degrees while a straight stop is like most valves and does not change direction.