That was our first thought, we had made a flat face gasket but we are not getting a good seal because the lip on our Hoga copper pot is hammered over the lip of the manway and is very uneven. I called every gasket supplier in the distillery, winery, brewery world and haven't found a good solution. It would help if someone knew what Manway manufacturer Hoga uses. I am suspecting it is Zorzini but would like a confirmation before I try to use my poor german skills
Much appreciate all the suggestions.