pvc tubing

Hey Reefers, I'll be using a Marine Modular 800gph Overflow (already purchased) on my 40G Breeder Reef Tank which will flow into a 20L sump. The Overflow will be plumbed in a bean animal format...all leveraging 1/2 in drains. I have a Varios 2 Pump that I'll be using for my return. Should I...