Originally posted by haasman
Your use of "tasteless" is of a concern as anti-freeze, even in small quantities can cause severe renal (kidney) problems.
I'm not suggesting making a cocktail out of it,
just dip your finger into the effluent and touch it to your tongue, then spit. By the time you've flushed enough for there to be no color, it's likely tasteless, but this test is optional.