Available as an OE installation or an aftermarket retrofit, the Cyclone DuraDrain from Bendix keeps water and other materials out of the trailer air system. It prevents contaminants from reaching the trailer reservoirs when installed on the supply line, and drains liquid, traps debris such as insects and dust, and purges with every brake release when installed in the control line. Bendix says the gladhand openings are traps for foreign material, and when coupled with the moisture naturally present in many tractor air systems in the winter, system operation can easily be compromised. The DuraDrain offers the protection users need for top performance.