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Maintaining pneumatic tank gauge

Discussion in 'Computers, Gauges, Watches and Analyzers' started by mark01, Jun 8, 2012.

  1. mark01

    mark01 Instructor, Scuba

    # of Dives: 500 - 999
    Location: Des Moines, Iowa
    I recently acquired a pneumatic tank gauge which sports a glycerin filled gauge. There exists a small plug at the top of the gauge housing which I assume could be removed so that fluid could be added should the gauge require additional glycerin. Am I correct in my assumption about that plug and where would I find glycerin??



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