Thanks for the feedback.
Thanks for all the feedback. The previous owners never found any water in checking the gascolator and I haven't either. I agree with the thought that extending it to the lower cowl leaves it liable to being snapped off in an accident and spewing fuel, although the C172 I flew had several fuel drains in the lower cowling. I guess I'll leave it alone for now and check it when I have the upper cowling off for other reasons.