Any hints for soling chapter 3 pipes puzzle?

I think the main point everyone seems to be missing about the pipes is that there has to be a straight connection from the furnace to the gas pipe. It's not just about having ends that are not open. I'm sure if you go back and look you probably only have to change one or 2 things around.

with pipes remeber you have to use them all
you cant just hook up to the ends all pipes must be connected and sealed

Hollister: Thanks for your help! I got through it! YIPEE