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Question about using the gas ballast on a vacuum pump. How long and how often to leave it open? : r/MechanicAdvice
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CPS Pro-Set® Two-Stage, Dual Voltage (115/230V) Vacuum Pump w/Gas Ballast Valve, : Collision Services by US Auto Supply
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Vacuubrand 696240 Diaphragm vacuum pump with gas ballast, dual-stage, 1.3 cfm, 220-240 VAC from Cole-Parmer United Kingdom
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