Easily operate Thermo Scientific™ Nalgene™ Repairable Hand-Operated PVC Vacuum Pumps with Gauge, ideal for siphoning, filtration, liquid transfer, bleeding fluid lines and checking for leaks. Lightweight units are sealed and self-lubricating with removable covers on exhaust port and trigger to release vacuum without disconnecting pumps from the line. Quickly attain and hold vacuum of 25″ (635 mm) Hg. The vacuum trigger release requires only one hand to operate and releases vacuum with the touch of an index finger.