So, I added pipes into my mod which are going to transfer energy between places, but the way I've been going about this is using what I call a PipeSystem. The constructor for PipeSystem contains 6 parameters:

(int numPipes, int numProviders, int numAcceptors, TileEntityPipe[] pipes, PowerProvider[] providers, PowerAcceptor[] acceptors).

Each pipe is linked to a pipe system and pipes automatically join pipe systems on construction if they are next to another pipe that has one. Each PowerConnectable (encompasses power providers, acceptors, and pipes) has a field PipeSystem pipeSystem. I need to save this object to NBT when the game is saved, but I have absolutely no idea how I would save a PipeSystem to NBT. Help

 

I think what you need to do is save the x,y,z, yaw,pitch... and your parameters to NBT using the TileEntity you have. Posting code would also be nice.