Thanks for posting Doug. I have no idea if they are interchangeable. Gonna take someone smarter than me to figure that out.
I did call Allen Equipment. They were highly recommended, but they didn't have a used one.
I just bought this machine used with a van included. I didn't expect to have issues right off but I did. And now I find out that a new water box will cost $450. After all the other costs I've had to put into this rig just to get it up to workable order, I'm just tapped out. Someone tried to repair this water box in the past with epoxy. It didn't work. It leaks and floods the van every time I use it. And it is cracked in many other places - just waiting to burst and make the unit unusable. Disappointing to say the least, but I have no choice but to try and find a way to make this work.