I tried to use the Repeater to connect the devices in the Wired Industry mod. Sadly, the Repeater would not transfer my items. (Nor would using an OR logic gate.) But my setup worked just fine if I connected the devices directly.

Perhaps there's something about the way that Wired Industry transfers items over wires which does not allow an intermediate device? Or, maybe it has something to do with how "power" (an on signal from a switch) has to travel along the same wires?

The reason I need a Repeater is because I made a huge liquid reservoir to hold and mix liquids and I wanted a setup to pump in and pump out. But the bottom of my tank is so far away that a direct connection is impossible.