The final step to finishing the toroid coil is to fill the holes with JB Weld where the wires exit. Since the insulation over the wires is sealed at the coil by the epoxy I don't have to worry about a leak between the copper wire and insulation from inside the unit. The insulation over the copper wires goes back into the unit and down into the toroid coil itself. Having sealed that part with epoxy there should be no possibility of a leak where water under pressure would find its way out of the unit between the copper wire and insulation. The JB Weld will securely seal this area permanently making the unit completely airtight.

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