Apparently after some digging, these look like Hardware labs nemesis gtr 240's. 54mm thick, 16fpi. So its cooper (also scratched around the fitting a bit to see and yep it looks like cooper/brass from colour).
Need to get new fittings, tubing, and start to reverse engineer that controller board.
This unit has inlet/outlet temp sensor. Flow meter, and all built into a custom controller. Controller has Jtag on it, so I think I will start digging.