Demonstrate the opening of clogged drains, using a vacuum plunger.

Demonstration should include the following steps:

• Fill the areas above the drain until the vacuum plunger cup is partially covered.
• Place the cup over the drain opening, forming a vacuum.
• Place a rag over the overflow or vent holes so the vacuum can be made complete.
• Press the plunger downward sharply until the obstruction is free.
• Test the drain.

Process/Skill Questions:

• What are the features of a vacuum plunger?
• What are the uses of a vacuum plunger?
• What hygiene requirements should be followed when using a vacuum plunger?