This Ss Brewtech recirculation bulkhead fitting is great for home brewers and small - scale commercial brewers. You can use it when you're brewing beer in your mash tun. It's made of 304 stainless steel, and it fits all Ss Brewtech kettles and mash tuns, so you don't have to worry about compatibility issues. Whether you're using the Vorlauf Arm Assembly, Recirculation Manifold, or 3/8' hose barb, this fitting will work well for you.