The pump base contains an integral, pilot-operated, 3-way air valve which controls vacuum on/off via a solenoid valve.
When the solenoid valve is energized, the vacuum pump turns on. When the solenoid valve is de-energized, the pump turns off.
This pump incorporates the bowl, gasket, and filter element of our t-style filters directly into the pump base eliminating the necessity of incorporating an external filter into the vacuum system.