This month's issue has an informative, and for me timely, review of Vac Pump options. It's time to proactively replace my Parker Hannifanb model at annual in Dec (1,000 hours). They review 3 possible replacements Tempest, Rapco and Aero Advantage (dual chamber). The former 2 have wear view ports.

They didn't cover the new wet pump which had caught my eye.

The Tempest may be my choice. Any opinions?