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Cleaning zinc plugs
3 years ago
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woko
NSW
1802 posts
woko
NSW, 1802 posts
2 Aug 2022 7:55pm
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Doing routine maintenance ? Find the heat exchanger zincs need replacing, of course they won't unscrew from the plug. Drill out what is safe without damaging the internal thread, then soak in phosphoric acid ( aka rust converter) voila !
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