Debugging in real life

Our family is working on the house. We have an integrated floor heating system, which is connected individually for each room. (we have three rooms, only two are connected yet)

Today we changed the main water boiler. At first it seemed like it was working, but then we lost pressure. It dropped fairly fast so we checked every sink, every water outlet.

We just missed the unconnected floor heating pipe, that was connected to the main pipe...

Its a fucking mess down here, so dont complain about you bugs, I have experienced worse!!!