Barbed Ball Valve for .700 or 17mm OD Poly Tube

Manual ball valves are used to offer manual control over water flow. This is often used to isolate specific parts of a system or at the end of a line to allow easy flushing of the system. It is not recommended that ball valves be used to restrict flow or pressure. They should always be used in the fully on or fully off position. Some ball valves automatically stop the ball in one of those positions, while others allow free rotation.