1. An air brake pipe connects to each car and locomotive on the train. 2. Also with ECP, the brake pipe remains charged during operation. 3. When the brake pipe and car components are charged with air, the brakes release. 4. To release the brakes, the engineer charges the brake pipe . 5. Air connections between the cars are made through two air hoses, brake pipe and main reservoir. 6. Low-level brake pipes were still fitted to maintain standards but only used when high-level could not be. 7. Pulling the alarm chain on a British train will pull a lever connected to the brake pipe flaps. 8. The triple valves detect an emergency reduction based on the " rate " of brake pipe pressure reduction. 9. When the engineer needs to make a brake application, control valves in the locomotive reduce the brake pipe pressure. 10. In the guard's van, this is seen from a valve which shows loss of pressure in the brake pipe .
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