Bendix brake valve question

[in2trux]

(09-20-2016 )Bahdan Wrote:  I've always wondered and tried to find a product someone can fill into the air tanks that would leak a dye. That way you could see where there was air leaking thru your system.

Actually, a smoke test would be better. I know a few mechanics that use them on gas engines to find manifold or vacuum leaks.