Feedback on 40 Gallon Breeder Sump Layout + Drain Questions

[VINCER20]

Hey everyone,
I’m setting up a 40-gallon breeder with a modular Marine 800 GPH overflow and a 20-gallon long sump. I’ve attached a picture of the sump layout I’m planning to use for reference. I’ve got a couple of questions about plumbing the drains:

1. Can I run my main drain with two gate valves—one directing flow into the sock area and the other into the refugium? I’d like to split the flow this way if possible.
2. If that’s not a good idea (or doable), could I run the secondary drain into the refugium instead?

I’ve included a pic of my sump layout below to show what I’m working with. Any advice or personal experiences would be awesome—especially if you’ve tried something similar! Thanks in advance!

 

[mpatterson42]

Why do you only have a single outlet on the overflow box when you can have three?

 

[VINCER20]

Sorry I just hijacked the image. I didn’t know how to edit it but it will be 3, I’m still waiting on my Jax racks kit to start building my sump

 

[mpatterson42]

Got it. Yeah, as long as your Primary Drain and Secondary Drain are the same height you can put gate valves on both and control both. It's not the most common configuration but it will work.