I needed a catch can for my new Transmission so I ordered this one from Moroso. It looks to be different from their old style petcocks and inlet. Old one entered through the side and this one enters from the bottom.
With the valve closed no fluid can get into the can and with it open, it won't hold any fluid. Did Moroso make a mistke with this. I can't see how this could work.

8197261-transcatchcan.jpg (105 downloads)