The plug was installed inplace of a hose fitting when Elnora was upgraded with a PYI dripless packing gland.
Patick picks up the story:
My survey last year discovered a corroded bolt that was in the place of shaft hose. This bolt was threaded in as a plug. Looks square on the top. I took some before and after pics after scraping away green corrosion. My dripless PYI seal is fine but your newsletter comments are timely for me. I am tempted to think my corrosion is related to your concerns.
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