How often should you drain air tanks on a semitruck?

Answer 1

I have been taught to drain the tanks at the end of every day so as to help prevent water and or oil from compressor getting into the complex valves that trucks rely on these days. Oil mixed with the condensation becomes a thick sludge and can gum valves completely over time or slow the normal operation of the valves down. Gear changes or brake systems rely on good efficient operation of many air valves specially late model trucks.