Recirculating wort back into the kettle to whirlpool the wort makes for much faster cooling and will also make a concentrated pile of trub and hop particles in the center of the kettle bottom. This whirlpool port assembly installs high up on your kettle wall above the typical wort level and then extends down before curving to the side to force the recirculated liquid towards the sidewall.
The BrewHardware purpose-built unit called the Spin Cycle starts with a weldless bulkhead design with captured O-ring and extended male threads and has the 1/2" drop tube fully welded in. The result is a compact way to whirlpool without the need to put a ball valve on the port (the port is meant to be installed well above the max liquid level). It includes the base unit with the welded drop tube, the captured high temp silicone oring, a thin SS washer and a 1/2" NPS locknut to hold it all together.