Originally Posted by Ranger9913
I just want to be able to run water for my mash and sparge. I stopped by the local welding place and got some dynaflow brazing sticks and I assume I'm going to have to use an acetylene torch as a MAPP gas probably won't cut it. Currently I have two 20' foot coils. When I unclamped my wort chillers and just stretched it out it fits perfect inside the converted corny keg. The second coil was coiled around a 2.5" pipe so I was thinking I will run that down the middle and connect both of these coils to a 3/4" copper elbow for water in and another elbow for water out.
Your gonna need to get it up to melting point and that is about 1000*. Mergeing that much copper will suck up a lot of heat. I suppose you could try and use MAAP gas. I have melted the silver braze with a propane torch on a standard 1/2" copper fitting.
I am interested in what some have to say about the scale that will form. I purged out my copper for all the braze joints I did. The inside of my copper tubes are bright and shinny. The outside is a different story.