Yes. You can also run an IV on a drive port that is free on an X2, or an XD. I've also wondered if you can run the IV on a regular wifi outlet by simply chopping off the GX12 connector and soldering on a regular plug. I did this in reverse for all of my ATO pumps. Soldered on GX12 connectors and connected them all to drive ports. The IV is nothing more than a stir plate... no reason it needs to waste a valuable drive port.So you can run an iV on a X4?
Also, there are a ton of 12V pumps on amazon that can, in theory, be connected to drive ports by adding a GX12. It's all stuff I want to think about at some point and play around with, once I get my actual X10 going. One of my other tanks has a spare X3 with a spare pH port so this is the one I want to experiment on.