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The copper will come wound tightly in a roll. Backwind the copper to a medium tight roll to the diameter of a 1/4 to 1/2 inch larger then the diameter of the tower so it fits snug into the tower. Insert 2 or 3 rolls of copper from the bottom of the tower then poor rings in from the top of the tower up to about 1? below where the condenser arm comes into the tower. The copper mesh will keep the rings from falling into the boiler.