plumbing an overflow help

[crhis]

i need some help plumbing an overflow.
a friend just bought a used rr tank.
i don't have any rr tanks so i'm kinda stumped on where to begin
any help is greatly appreciated
ccc

 

[L and L]

Maybe these plumbing schematics will help you get started.

This is my total aquarium system. Please note that you should
not rely on a check valve.