Just looking for some help with plumbing. I am using all 1" pvc pipe for both the overflow and the return on a new tank build. The overflow is easy since it doesn't attach to anything except the bulkhead but on the return I'm not 100% how to connect to the pump and the return. I'm using a U-Tube Directional Return that says it accepts 3/4" - 1" ID Tubing. I was hoping I could snugly fit a 1"pvc over it but it won't. It's too big for the 3/4" section and too small for the 1" section. On the pump I am using it has a barbed fitting adapter that is for 1" ID Tubing as well and the same thing. It just won't fit inside a 1" pvc. Do I need to use some kind of barbed fitting on my pvc to connect or is there an alternative without using any vinyl? Thanks!