Review on 🔴 Artshu Micro Vacuum Pump - High Negative Pressure Low Flow Air & Water Pump for Cupping Device, Fish Tank - 3V, 6V, 40KPA, 0.7L/min (White) by Steven Harmon

There is a small advertisement in the technical section stating that this pump has an expected lifespan of over 100 hours. I bought a 6 volt one to test. I stripped and soldered the USB cable and then plugged it into a cell phone charger (5 volts). It worked as advertised. Both of mine have been running for about 190 hours, pumping a salt water solution (aquarium water). The pump membrane was leaking in both cases. The first was below the waterline and water entered the engine and jammed it. The second was mounted above the waterline and was still pumping water after 190, but was sucking quite a bit of air into the pump due to a defective diaphragm.