An automatic drain valve removes mixtures of compressor lubricants and water from the compressed air systems. It is important to have a fully-functional drain valve as it helps in avoiding maintenance work and eliminates the need to manually extract liquid from the air compressor.

Drain valves allow excess water vapor to exit the tank and reach the atmosphere. Condensation buildup can result in corrosion that damages the compressor, shortening its life span. By removing the extra moisture, you reduce wear on equipment powered by compressed air systems.