over flow arangement
 

Steve,
They are 1.5" each. I have a little giant 4MDQXC but it's too much. I had fun playing with this, remove the screens, get more flow, remove the elbows, get lots of flow. Straight pipes with screens are good flow but loud. So I have a recirc line in my sump. with a 1/2" outlet. My returns are both 1" in to the tank, so I would have to guess I have 600-800 GPH going through these 2 lines. I would have liked more, but I'm stuck with this for now.

I could put a T on the top of each pipe and have more flow, but I don't have the extra screens. Plus a fitting doesn't exist for that, JL had to build the one they are using with the T.

over flow arangement
 

Lee, if that Little Giant is too much for you, I'd be interested in it. I have a MAG 5 as part trade if you need it.

over flow arangement
 

The LG is all plumbed in and I'm not pulling it out, sorry. I like having too much flow, plus this gives me a project to upgrade the over flows later. I have some acrylic left from the Reactor and will make some boxes to put on my towers, if I keep them short I should not get too much water falling sound. Just need to get a 1/4" bit for the router to make the slits in the boxes.