Originally Posted by
dinasrt
We have a slight misunderstanding here. Didn't you just suggest that he use this inline sight glass instead of replacing his OEM coolant tank?
Sorry bout that. What I meant was to put one of these in line on the N/W kit instead of the suggested separate tank (i.e. the BMW/ VW Ebay style)

I'm just throwing out a menial thought as a way to satisfy the need for those who think they need to monitor the level of the separated system.
This way lets you open the hood and look as opposed to opening the lid on a separate tank to view the fluid level. As others have said, once the kit is installed and purged, it's kinda senseless to worry about the level from such a low pressure system, unless of coarse you have leakage.
From FiftyThree033: I understand, but how do you know if you have run low? I'd like an "at a glance" indicator. Seems it would be an extra insurance measure. If you did have a I/C circuit leak, the reservoir level would indicate the condition very obviously and quickly.