Yea I looked there. Nice stuffed but 50+ bucks for a plastic box.... ill just make one. That's coral money!! So should I just leave the check valve off? I'm gonna go over the tank for the return. I'm also thinking of leaving the ball valve off cause that pump I have won't be to much flow. U can always add one if needed I'm putting detachable couplings on both pipes for maintenance and what not. Also with the return line will the water syphon down into the sump with a power outage when I have it run over the tank? Thanks