the gasket is adapted to prevent leakage from a tapped line furthermore the valve assembly also includes a needle 72 the needle is used for tapping a refrigeration line held by the platform when clamped by the pliers the needle is disposed within the bore of the housing the needle includes a conical tip end 74 for piercing a refrigeration line and a threaded base end 76 extending from the housing the base end is adapted to be coupled to an external cable connector of a refrigeration line evacuation system furthermore with respect to the needle a cavity 78 is formed in the base end a first channel 80 is axially disposed from the base end 76 to the cavity this allows communication between the base end and the cavity a second channel 82 is axially disposed within the needle from the cavity to the tip end 74 this allows communication between the cavity and the tip end furthermore with respect to the value assembly a valve 84 is disposed within the cavity 78 of the needle the valve has a gasket 86 disposed adjacent to the base end 76 the gasket is aligned with the first channel 80 within the needle 72 a ball 88 is disposed adjacent to the gasket the ball serves to open and close the valve a spring 90 is disposed within the cavity and is used to urge the ball towards the gasket in this configuration the valve provides one orientation for preventing communication through the.