Review on Orion Motor Tech HVAC Vacuum Pump and Gauge Set with AC Manifold Gauge Set, 3.5cfm AC Vacuum Pump and Gauge Set for R134a R12 R22 R502, Self-Sealing Can Taps Quick Couplers Included by Yung Cypher

Quality: The manifold itself could not create a vacuum. Spent most of the day and half a nitrogen tank trying to find the leak. It turned out to be a gasket between the low pressure sensor and the manifold. Then I wasted $30 on R124 because the stopcock used to puncture the R134 can leaked at the top. The pump worked as intended. Missing Features: The yellow line used for the pump and refill has no flush valve. So, by filling the system, you are reintroducing air and moisture. Each time you switch banks, you enter more. There isn't room on the manifold to block the high and low terminals meaning they will bounce and get dirty, but also means you can't attach them to test the manifold for accuracy yourself.