Return pump priming needed?

[Eb0la11]

My return holes are drilled at the highest point possible. Ive said it my build thread that 15-20G on my floor wouldnt really be the end of the world. Im in a basement thats unfinished so it wouldnt really do much damage. I already had some from my FW tank leak when one of my o-rings wasnt tight on my pumps when I moved to this new place. No biggie, but itd be nice to have a flood proof tank.

I got a backup plan anyways if this check valve doesnt work by the end of tomorrow for an emergency empty reservoir that I could plumb off my sump through the, right now, plugged holes drilled in the back that are a bit above my chambers.