Quote:

Quote:

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.



2 things... does it have a vent on the top and why close
the valve.. if its above the vent port it will drain back
in so you dont need to drain it




My son's car has the old style one and it enters from the side with the valve closed. Open up the petcock and it drains out.
And yes there's a 1/8"npt screen vent on top.
Good point about keeping petcock open but it defeats the purpose of having a catch can.