1/2" Straight Quick Connect (Blichmann)

If you were using the old Blichmann quick connects, you might look and say, "these are not them." But they're better -- note that the connector has a high-temperature silicon anti-slip collar to replace the older plastic ones (which can melt from the heat from your boil-pot burner).

Near as I can tell, this is the most sanitary connection possible when dealing with threaded fittings. thanks to these if you can 30 connections that I have can all be quickly disassembled, cleaned, and reassembled without needing to mess with any kind of sealant.