The A-11 torch tip I received worked flawlessly soldering 3/8, 3/4 copper tubing for heater, Ventilation and soft copper with silPhos fifteen%. . The ambient temperature outside was 55Β°F and windy. No doubt he would have easily done 7/8 or 1 inch. The tip is much louder than my A-3. Noticeable whistling effect. Impressive to say the least. Quickly turns a coppery dull cherry color.
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