FWIW, if you 'need' a check valve then you have designed your plumbing wrong.




I like the stand, especially the slatted ends. Did I miss the dimensions? I was wondering how tall the stand is. I find most 30-36" ones too low for me (of course I am 6 foot myself). I suppose it would be perfect height for viewing if seated on a sofa. Can't wait to see what you put inside this beauty.
I don't need a check valve but it was a nice union and it won't fail in the pump on position so why not
I only just skimmed the thread but why did you drill two additional holes in the back panel for returns??? Why not just use the predrilled holes in the overflows that are made for returns??? Seems you just added more complexity and more room for a failure doing that, plus now you need room behind the tank to access that plumbing (you can't push it flush against a wall).
Hmm... Weird.its a herbie overflow in a reef ready tank..... you need a full siphon drain and an emergency in each filter box..... the tank sits on an angle in a corner as well so i can work on it from behind...
nice job on tank and plumbing,only thing concerns me is back siphon on your returns or am i missing something cant wait too see it set up good job!!