Uploaded September 2019 | Updated September 2026, 2 days ago

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Testing my new OLD vacuum pump! A very old Welch duoseal 1400 laboratory vacuum pump capable of pulling 0.1 Micron vacuum.
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Here's the modern Welch Duoseal 1400: amzn.to/2ZCDXlX

A much more affordable vacuum pump: amzn.to/2ZKZusN

Polycarbonate lid I used: amzn.to/2zFTsyY

Closed Cell Neoprene Sheet: amzn.to/2NGtvra

Vacuum Gauge: amzn.to/2ZGsr9d

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