Pot Still with Leibig
Posted: Fri Dec 20, 2013 12:04 pm
This is my first still. I wanted to try it out first without investing a lot of money in the project and was fortunate to have some pieces of copper laying around. I can hardly believe how much some of the fittings etc cost...
I had some 1" pipe so I used that for the riser, then reduced down to 1/2" in the arm for the rest of the unit. I put in a threaded brass union between that and the leibig. The union is definitely worth it, not hard to put in and very convenient when assembling/dissembling. The leibig is an 18" length (what I had) of 3/4" pipe around 1/2" pipe. I wound a spiral of 12 gauge wire around the 1/2" pipe and soldered it at the ends, with about 3/4" between turns. I have 1/2" clear plastic pipe for the water feed for the leibig, coming from the kitchen sink. The attachment to the sink took a bit of doing, had to buy an adapter for a hose thread that went on in place of the aerator and then a 1/2" hose barb to connect to that. Easy, once you figure it out, but confusing as hell in the store.
I am using a 12 quart SS pan initially, and plan to upgrade to something that can handle about 5 gallons at a time. I had the guys at work cut out a piece of stainless for the top on the water-jet, with a 1" hole in the center. I tested a piece of scrap SS and a piece of copper to see if I could solder it and it worked pretty well. I had a zinc based flux on hand already, so I used that. Heating with standard butane torch.
I couldn't find a 1" piece of copper with a flange on it, and the prices were exorbitant anyway, so I made my own flanged fitting from a straight copper fitting flared out a bit with a hammer and the end of the vice anvil and then turned it over and pounded the flange down flat. Worked quite well, all freehand work. A little filing and sanding and I ended up with a good flanged fitting.
When I tried to solder the flange to the SS lid it was a complete disaster. The lid bowed up like a bowl and I couldn't get a good flow of solder between the two pieces. When it cooled down there was a loud twang as the lid flattened back down and broke the solder connection between the two pieces. At this point I was somewhat discouraged. I decided to try tinning each piece separately and then just heat them to fuse the solder together. After cleaning and sanding I coaxed the SS to tin with a brush full of flux scrubbing the surface and moving the solder over to cover the whole area. I held the copper fitting with a pliers and heated it up till the solder melted, flicked off the extra solder (it was well tinned) and decided to have a go at finishing the connection. I fluxed both sides well and since the SS was still pretty hot I just set the copper on top and directed the flame only on the copper, flame parallel to the surface of the lid. This heated the fitting and transferred enough heat to the lid to complete the joint. With a lot of filing and sanding it actually looks pretty good.
I had some 1" pipe so I used that for the riser, then reduced down to 1/2" in the arm for the rest of the unit. I put in a threaded brass union between that and the leibig. The union is definitely worth it, not hard to put in and very convenient when assembling/dissembling. The leibig is an 18" length (what I had) of 3/4" pipe around 1/2" pipe. I wound a spiral of 12 gauge wire around the 1/2" pipe and soldered it at the ends, with about 3/4" between turns. I have 1/2" clear plastic pipe for the water feed for the leibig, coming from the kitchen sink. The attachment to the sink took a bit of doing, had to buy an adapter for a hose thread that went on in place of the aerator and then a 1/2" hose barb to connect to that. Easy, once you figure it out, but confusing as hell in the store.
I am using a 12 quart SS pan initially, and plan to upgrade to something that can handle about 5 gallons at a time. I had the guys at work cut out a piece of stainless for the top on the water-jet, with a 1" hole in the center. I tested a piece of scrap SS and a piece of copper to see if I could solder it and it worked pretty well. I had a zinc based flux on hand already, so I used that. Heating with standard butane torch.
I couldn't find a 1" piece of copper with a flange on it, and the prices were exorbitant anyway, so I made my own flanged fitting from a straight copper fitting flared out a bit with a hammer and the end of the vice anvil and then turned it over and pounded the flange down flat. Worked quite well, all freehand work. A little filing and sanding and I ended up with a good flanged fitting.
When I tried to solder the flange to the SS lid it was a complete disaster. The lid bowed up like a bowl and I couldn't get a good flow of solder between the two pieces. When it cooled down there was a loud twang as the lid flattened back down and broke the solder connection between the two pieces. At this point I was somewhat discouraged. I decided to try tinning each piece separately and then just heat them to fuse the solder together. After cleaning and sanding I coaxed the SS to tin with a brush full of flux scrubbing the surface and moving the solder over to cover the whole area. I held the copper fitting with a pliers and heated it up till the solder melted, flicked off the extra solder (it was well tinned) and decided to have a go at finishing the connection. I fluxed both sides well and since the SS was still pretty hot I just set the copper on top and directed the flame only on the copper, flame parallel to the surface of the lid. This heated the fitting and transferred enough heat to the lid to complete the joint. With a lot of filing and sanding it actually looks pretty good.