Why is it important to drain water from the compressed air tanks?

Draining water from the compressed air tanks is crucial mainly because water can freeze in cold weather and potentially lead to brake failure. When the temperature drops, any moisture present in the air tanks can freeze, obstructing air flow and reducing brake system performance. This can result in brakes that may not engage properly, leading to dangerous driving conditions.

While rusting of the tanks, dilution of brake fluid, and damage to the air compressor are valid concerns associated with water accumulation, the immediate threat of freezing in cold weather presents a risk that can dramatically affect safety on the road. Ensuring that air tanks are regularly drained helps maintain the integrity and effectiveness of the braking system, particularly in adverse weather conditions.