Positive or negative

I’d say that’s likely an evap (they’re much thinner than the other lines). CB are terrible for them 😩. May be worth double checking with a red dye test to be sure. 🤞best of luck!

I would agree with above, I think that’s an evap line due to the line being so thin. I would try a pink dye test like first response as they are more reliable x

Have you got any more you could try with? X

I think a negative- the line is too thin to be a positive and the ink has run on the left side x