a vacuum vapor liquid recovery system employs a strong vacuum vessel that can withstand vacuums without damage . the vacuum vessel may be portable and configured to accept an inflow drain line for receiving waste liquid / vapors from a processing system . additionally , at least one outflow drain line is attached to the vacuum vessel to which a vacuum truck or other similar recovery equipment can be connected in order to pump out whatever liquids / vapors have been drained into the vacuum vapor liquid recovery system . additional features can include wheels to assist in moving and positioning the vacuum vapor liquid recovery system , tow bar , transport handles , support legs , sight port , a wash out connector , a vacuum relief , etc .