What must be done before waste that may harm the drainage system is discharged?

Before waste that may harm the drainage system is discharged, it must be treated. This is crucial because untreated waste can lead to various issues, including corrosion of pipes, blockages, and contamination of water supplies.

Treatment typically involves processes to remove harmful chemicals, pathogens, or solid materials from the waste, ensuring that what ultimately enters the drainage system is safe and compliant with environmental regulations. Such procedures help protect the integrity of plumbing infrastructure and preserve public health.

Choices like dilution or temporary storage do not adequately address the potential harm caused by harmful contaminants in waste. Simply diluting a harmful waste might reduce its concentration but not eliminate its potential corrosive or harmful effects. Similarly, storing waste does not mitigate the risks; it only delays the inevitable discharge of harmful materials into the drainage system. Thus, proper treatment is the essential step before any waste is allowed into the drainage system.