Final answer:
Drain the water from compressed air tanks to prevent corrosion, microbial growth, and operational issues for tools, and to maintain the tank's integrity and safety.
Step-by-step explanation:
You should drain the water from compressed air tanks because moisture can accumulate inside the tank due to the air's condensation. As this water collects, it can cause corrosion inside the tank, possibly leading to the weakening of the tank walls and eventual failure. Moreover, the consistent presence of water can foster the growth of microbial organisms, which might further degrade the tank's integrity. Besides, water in the compressed air system can cause operational issues for pneumatic tools and processes.
Additionally, when compressed air is released from a full tank, the rapid expansion and drop in temperature can cause moisture in the air to condense into water droplets. It is similar to how releasing compressed air into a room disperses matter and energy, requiring an input of energy and resulting in a cooler nozzle due to the endothermic nature of the gas's expansion.
Ultimately, regular drainage of water from compressed air tanks maintains their safety, efficiency, and longevity, ensuring that the tank and the tools it powers operate effectively and without unnecessary risks.