True Weldless Bulkheads from Brew Hardware are purpose designed liquid tight bulkheads available in a number of configurations. These aren’t a mish-mash of off-the-shelf components. Check out Brew Hardware’s video [TRUE BULKHEAD line of products] on these great bulkheads.
Brew Hardware has been out of stock on a number of configurations. The Large Barb Version has just come back in stock. That features a large 5/8″ barb (great for 1/2″ ID silicone tubing) and can be installed in Igloo and Rubbermaid (choose flat gasket option for Rubbermaid) or any other vessel with a 13/16″ hole. This is also a part of their great Mash Tun Conversion Kit [Review].
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