Demonstrate the opening of clogged sewer drains, using a biodegradable drain cleaner.

Demonstration should include following the manufacturer’s instructions for use of a biodegradable drain cleaner.

Process/Skill Questions:

• What safety precautions/procedures should be followed when using a biodegradable drain cleaner?
• What are some materials that may clog up the drain lines?
• How do biodegradable drain cleaners serve to clear drain lines?