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post #3 of Old 04-10-2005
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Thruhull/Seacock Removal

After 18 years in service the throughhull has probably lost quite a bit of its zinc content. Simply take a face grinder and grind away from the outside until you can push the remaining stub through the hole. Just be careful not to overheat the through-hull by excess grinding so that you dont thermally stress the fiberglass. Otherwise, if you want save and reinstall, use an ''extension'' on your pipe wrench as a ''persuader" - sometimes packing the inside of the bore with dry ice will help.
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