The Ss recirculation manifold is a nice gentle way to recirculate your wort. The manifold sits on top of the grain bed and evenly distributes the flow through 24 different holes on top of the manifold. Works great with our recirculation bulkhead fitting (BE386) and 1/2" FPT to 3/8" knurled hose barb (BE387). The manifold will fit in Ss Brewtech 10-30 gal kettles and mash tuns. It's 12.6" in diameter of 304 stainless steel with a 3/8" hose barb inlet.