Velocity Labs has expanded its new Velocity Expulsion Valve to
include a vacuum hookup valve. The new Vacuum Valve
housing fits into the existing VMP-007 mounting plate and allows a
vacuum tube to connect to the socket through a 3/8-in. spacer
plated mounted under the socket. This system creates a safety valve
between the socket and any vacuum systems, so if the vacuum system
fails, the socket still works as an expulsion system.