I'm busy plumbing in my WRC breather and im
not 100% sure what to do with the top outlet.

i know it's to vent to atmosphere but I'm reading a few people running to a catch tank (which is what I would like)

my problem is that the outlet is 22mm ( or 7/8, AN -16)

i cant find a small 1 litre tank with AN -16 fittings on it and it's a big drop from AN -16 to say a AN6 -6 or 1/2 13mm.

do I really need a tank for a wrc breather?

its already proving to be a ballache fitting so far

thanks