I found out yesterday by spending a few hours pulling and then cleaning the old threads what size. I would suspect some neglect led to the current situation. All the zincs were gone just the plugs left behind with quite a bit of sediment. Cleaned all the threads and new zincs with a schedule to check per recommendation.
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“Try something you could fail at. We all do things that we can comfortably achieve, but rarely do we set the high bar one notch above what we think we can clear, and that’s what’s driving me on here.” Lieutenant Colonel Alastair Edward Henry Worsley MBE (4 October 1960 – 24 January 2016) Explorer
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