please help me understand plumbing

[Reef-Geek]

Originally Posted by Cal_stir

yep

thanks, but the problem is why they make it this way, obviously the hole won't below the water line, did they do it on purpose?

[Cal_stir]

i don't think they made it that way on purpose, maybe your overflow is a little short or the fittings didn't push all the way in when glued, or some other glitch but i think the hole should be just below the water