I need some help or ideas on how to attach the bottom drain to a Rootlieb gas tank. What have some of you tried that worked. If I use a torch and braze I think it will warp the tank. I am trying to fasten brass to metal, I think that could be the problem. Any ideas would be appreciated. Sam
Solder it on. Tin both surfaces first and then sweat them together. do not attempt to braze it.
If its bare steel, you could also silver solder them.
I believe that you will have the same consideration for attaching the filler (at least I did). I agree with Dan