Ok, quick question.... I ordered a 450 compressor but cant find anywhere the size of the check valve fitting? is it 3/8" or 1/4" in? Thanks

1/4". The checkvalve itself is screwed into a swivel fitting that is Male 1/4" NPT. Have fun and good luck man, i've had some fun with mine lol

It fit right into the female water separator i got from FBI ... man does that thing work good. When i was in Miami for Scion Exposed it got full just from the show, on that coast it's more humid i guess cause over here where i'm at it takes a long time to fill the separator up.

Thanks... ordered my last bit of stuff... hopefully.

np man. if u need any help ask me man, i've learned a lot during this whole install