Mite as well post this up to. This is my 15 gal Keg boiler. I welded my bungs in for the drain and two heating elements. I'm holding off on the 4" triclamp flange I have for it until I get the 4 incher done. I took a 3/4" and a 1" stainless unions and cut them in half with a large hole saw and cleaned them up a little to weld on to the keg. The 3/4" is for my drain got a nice 3/4" stainless ball valve for it. The 1" are for the heating elements. I placed the drain half way between the carry handles on the keg. I thought that would be the best place to put it. So it wouldn't take out my shin when carrying it. I then placed the two 1" bungs on the other side of the keg at roughly 90 deg from each other. And 45 deg off center of that side. Yes its a crappy weld job. What do you expect? I haven't welded in 4 years.
Oh it was a wire welder with stainless wire and 3 gas.
I only have the $20 I paid for the keg invested. All the rest are freebees.
Heres the unions. one uncut and one cut