Very beautiful set up. You do nice work.
Hey Steve thanks. I think this is more your tank then mines lol. You know your input is always wanted/needed.
Is your drain only 1"? Usually it is a size or two larger than your return. I looks like you reduced it in the picture.
The drain is 1.5" but I'm very limited on space, which is why i decided to reduce from the bulkhead. Since i will be reducing the flow some in my return to help force the water to the reactors, I didnt think it would hurt. Of course i could be wrong so please advise if so. The ball valve is more safety measure then anything. If anything ever happened where i needed to shut off the drain line i could.
The tee you placed on the drain will work better if it is placed in a bullhead direction, to evenly split the flow to each bulkhead to your sump. The way it is currently, most of your water will go to the one that flows straight through the tee, the path of least resistance.
The way the filter sock chamber is set up, after the water cant flow thru on sock, it forces it into another sock and once all 4 are stopped up, then the water flows thru emergency lots above the socks. So i dont think it hurts if water is flowing in one inlet more then another. But i will look into getting something like a y tee. Idk the proper name for it.