Recently you changed the colour display of the pipes, and now you can't see if the liquid inside it is hot or cold, because the colour that the pipe window shows is the "liquid colour" instead of the Temperature colour... This can be "fixed" (collons since it is not broken) by adding a "Red-ish" glow to the pipe graphic. I mean NOT the window showing the content of the pipe, but for the REST of the pipe.
This way, the pipe would inform:
-The content: by the colour of the liquid in the pipe window.
-The temperature of the liquid: by having a blue glow in the pipes for cold liquids, and a "glowing red" for hot ones. As if the heated pipe would be red-hot.
I think I am explaining myself, but if you don't understand what i meant with this, just say so and I'll try to explain again

KEEP UP THE GOOD WORK

Kudos!