I'm going to install a floore floor panel system with 16mm pipes, does anyone know how I should think about the return, i.e., where all the pipes (4 in total) from 2 loops come together and go further to the manifold, how tight can I lay the pipes? In the rest of the room, the grooves are pre-cut in the floor panels, so there's a set distance, but thinking about where I join the pipes towards the manifold, it would be good if I could cut my own grooves and tighten the spacing. But is there any "rule" that specifies a certain distance between the pipes?
// Daniel