I built mash tun from a cooler and used a galvanized iron coupling to connect to the spigot. It was only after I brewed a couple beers that I realized something doesn't look right.
The beer hasn't been consumed and I dumped it and will just replace the coupling. But should I take any further precautions? Would the coupling cause any further contamination that would call for replacing more parts (like the spigot, bottles, whatever)?