Testo 565i Vacuum Pump (0564 5652 02) Manually watching a vacuum gauge and guessing when a system has held long enough is one of the easier places to get an evacuation wrong. The testo 565i removes that guesswork by automating the process: it stops pumping once the target vacuum is reached and immediately runs a hold test to confirm the system is airtight, logging the data as it goes. This automated evacuation and hold-test function specifically requires pairing with the testo 552i vacuum probe, which is sold separately — without it, the 565i still runs as a standard two-stage pump, just without the automatic stop and test. Rated 7 CFM (198 l/min) with a two-stage rotary vane design pulling down to 15 microns, it's built for A2L and A3 flammable refrigerant compatibility, which matters increasingly as more sites move to lower-GWP refrigerants that