Mike the pump that feeds it is between 5OO-600 gph (I can't remeber off the top of my head the exact number). All the piping in the refrigerated system is 1/2" including through the refrigerator. Fitting in the system are all JG. The tee's are 1/2 slp x 1/2 slip x 1/4 threaded. Into the 1/4" threaded is a 1/4" JG threaded adapter (you can find them online or at some Home Depot type stores). I had it originally by a Tee into my return line. When I clean my sump I had a bad habit of bumping it and loosening up my bulkhead (this was more ideal but I had to compensate for accessibility/clumsiness). It is now plumbed so that the system loops to the last chamber in my sump and the food enters the tank via the main return pump. I honestly don't like doing it this way because before the food did not come in contact with the return pump, now it does. Not saying in the future I might change up the plumbing and add a actuated valve like Steve did. To minimize the space around the holes you can look at picking up gromets and to reduce the space between the pipe and the refigerator. If you want to go Elos theme, they also sell them but they tend to be at 70-80 each for the anodized blue ones. For picture use I don't mind as long as I am paid my royalty fees
