  PlugMaster Thru-Hull Emergency Plugs More boats are lost because of broken hoses, clamps, or fittings than from any other cause. Make no mistake -- those through-hull fittings are basically holes in your boat. Tether a sized wooden plug to each fitting ready to pound into place in case of failure or leakage. Made of wood for a snug watertight fit, these are drilled for permanent attachment to your fittings.
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