FN-1030: Funnel, Addition, Graduated, Glass/PTFE Valve Similar to FN-1020 but with an additional stopcock on the upper part of the sidearm. The additional stopcock is incorporated into the pressure equalizing arm to permit the funnel to be filled without exposing the system to the atmosphere. For replacement for PTFE or glass plug and accessories, see AC-0010, AC-0012 and AC-0016.