Correct, the fluid circulates (recycles) but by the time the fluid returns to the bottle there are no bubbles. Well, at least I never saw the bubbles there...only at the bleeder screw. I think the nitrogen is trapped between the spheres and the valve.

Again, if your fluid is not clear and clean you need to change the fluid and the strainer filter (mounted in the bottle).

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.