Ok guys. I am slowly working on the design to pipe my tank so I can use my DCT4000 return pump. I plan on adding a manifold to the return line for my BRS dual reactor plus add a spare hook up. My question is what about on the drain? I like having my BRS reactor going into my filter sock (so all water entering my tank passes the filter sock first) I was thinking of adding manifolds to the drain line as well but concerned it might cause flow back into the reactors. Thoughts?