The FJC Hose Vacuum Adapter, Nos. 6880 and 6890, allows users to connect a vacuum pump inline to draw a vacuum on the system and their manifold set and charging hose. It can also be used as a port to connect an oil or stop leak injector. No. 6880 connects an R1234yf hose to a vacuum pump, while No. 6890 does the same for 134a hoses.