Hi guys. I have picked up a 115 gallon tank(48x18x31) with two built it holes and 1.5 inch bulkheads already installed for drain and return. I have a 35 gallon sump refugium to go with it as well. I am just getting really confused with the plumbing. The drain isn't much of an issue since I can run 1.5 inch piping all the way down to the sump. Problem I am having is designing the return line. The pump im hoping would work is the mag drive 9500 that I have lying around and it has an outlet of 3/4 inch male while the return bulkhead in the display tank is 1.5 inch. not sure how to connect the two. I will need a check valve and a ball valve there on the return line. Can anyone please give me a design on this plumbing project? This is my very first sump so any help would be highly appreciated. I still have to put an overflow box around the bulkhead since it didn't come with one. Dimensions for overflow box would be helpful too. Thanks.