I had someone come to my home and build a 450 gallon tank with side outside overflow boxes and a 120 gallon sump. But now I can't find someone to come and plumb it in. It has 2 drains on each box with one return on each side of the tank. Does anyone have a similar tank with pictures of how they plumbed it in? What kind of bulkheads should I go with if I use flexhose to plumb it. Slip/slip or slip/thread? Here is a pic of the tank and sump.



