6AN Check Valve

Installed this in my fuel return line and the male-to-male 6AN threading made it a clean, leak-free fit. It’s doing exactly what I needed for my build.

Took a bit of force to get the AN fittings threaded on, but once seated it holds pressure perfectly for my bypass loop. The all-metal body feels solid and has stopped any backflow issues I was having.

Installed this between my fuel pump and rail, and it solved my hot-start drain-back issue immediately. The double male 6AN flare ends made for a clean, leak-free connection. Exactly what my setup needed.