When installed between a Visiprep SPE vacuum manifold and the vacuum source, a Supelco SPE Vacuum Pump Trap collects all liquids that are aspirated through the SPE tubes, preventing contamination of the vacuum pump. The easily assembled kit contains a polypropylene filtering flask, a one-hole rubber stopper, 4 in. (10 cm) of polypropylene tubing and 5 ft. (1.5 m) of red rubber vacuum hose. The volume capacity of the Trap is approximately 1 L.