We are introducing a variety of valves Vac making connections positive and fast bag.
Some of the Vac Valve disposal are:

VA-VALVE 401C – Through the right bag
AQD 500 – Quick Disconnect
VAC-GAGE30 – Vacuum gauge
AIRVAC 22 – Style, “Venturi” LEQ-70-Vacuum leak detector, VAC-REG-vacuum regulator