Primary pipes (5)
I believe the answer is:
mains
(Other definitions for mains that I've seen before include "Utility network" , "power supply" , "Distribution network" , "current public source" , "seen in cockpit" .)
I believe the answer is:
mains
(Other definitions for mains that I've seen before include "Utility network" , "power supply" , "Distribution network" , "current public source" , "seen in cockpit" .)