Liquids drained from a category 3 vacuum source shall discharge _ to a sanitary drainage system?

The correct answer is that liquids drained from a category 3 vacuum source shall discharge indirectly to a sanitary drainage system. This is essential to prevent contamination and protect the public health. Category 3 vacuum systems are associated with the removal of fluids that may contain biological hazards. Therefore, the discharge must be managed in a manner that safeguards the sanitary drainage system from potential pollutants.

By requiring that the discharge is indirect, it ensures that there is some form of separation or treatment that can manage the risk of introducing harmful contaminants into the sanitary system. This often involves using traps or appropriate piping systems that mitigate any possible backflow or cross-contamination. Such precautions are crucial in healthcare and laboratory environments to maintain hygiene and safety standards.