The only difference between soldering and brazing as far as I know is temperature required. The filler material always has a lower melting point than the two materials being joined.
On my kettle, I used the dimple method with a 1" half coupler soldered in. The half coupler provided a perfect surface for a silicone o-ring to seal. I used a weatherproof box, almost identical to Kal's installation to cover the connection. It works great, hasn't leaked a drop.
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