I'm sure this has been asked before, but I can't seem to find an answer to my specific question. Here goes:
I bought a stainless steel 10.5 gallon brew kettle and want to add a stainless 1/2" ball valve. I've heard mixed reviews of the weldless add-on valves and my neighbor (a plumber and steelworker) has offered to weld one onto my kettle for me instead. However, I've read that you need to be careful to have a sterile weld. Does "sterile" refer to eliminating any places for microbes to hide near the weld site (i.e., a smooth weld) or does "sterile" mean something else?
Thanks in advance for the help!