Allow excess air pressure to be released from air tanks | |
Allow water and oil to be expelled from air tanks | |
Deliver air from the air tanks to the air brakes | |
Deliver air from the air compressor to the air tanks |
On every air tank connected to the air compressor | |
On the air compressor | |
On the last air tank connected to the air compressor | |
On the first air tank connected to the air compressor |
Air pressure falls below 50 psi | |
Air pressure falls to 0 psi | |
Air pressure falls below 60 psi | |
Air pressure falls below 100 psi |