Hey there,
is there a way to get a combined Heating- and Aircon-Pipe Overlay? The constant switching between both overlays is not so handy...

Edit: I just found out, that the pipes CAN overlap without any problems.... well... for some reason I always thought that this will cause a problem.

Then I might add: In the building overlay the pipes shown to be connected. This might be confusing as they won't connect once builded.