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The regulation went into effect in 1998. According to the "Federal Motor Vehicle Safety Standards and Regulations" Standard No. 121 paragraph S5.1.2 "manufactures are required to provide either an automatic condensate drain valve for each service reservoir or have a means of moisture/contaminant...

I'm talking about 2014 not early models grandfathered in. If you complete this project in 2014 you will be required to meet 2014 standards. Go and talk with any State Patrol inspection station, you will soon find out what is required.

As far as the air-dryer goes, according to Federal regulations you either have an air-dryer or as "Birdman" mentioned an "methanol injection" system. As far as the air compressor goes, it probably does meet the minimum CFM requirement but it does not have the "duty cycle" needed for a total air...

A couple of things need mentioning about converting to air-brakes. One, you will need more and larger air tanks (at least 2 ). Two, you will need R-14 valves for each axle. Three, you will need several one-way check valves in the system. Four, you will need an air dryer like the Bendix AD-9 or...