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Plunger

technology Maturity 5-7 Next article →

A plunger is a tool used to move fluids.

Plopper
Plopper

In plumbing, a plunger clears clogs in drains. Most have a rubber suction cup. This cup sits on a wooden or plastic shaft. A man named John Hawley invented it in 1874. He called it a "vent-clearer." Later, people added a flat rim to the cup.

To use it, push the cup against the drain. You can press hard to force air in. Then, pull the cup up quickly. This creates a vacuum, which is a strong pull. The pull moves the clog out of the way. This works best if the pipe has water. Water does not compress like air does. This helps it move more force.

Some plungers look like a bowl. These are for toilets. Other plungers use a bellows design.

Labeled syringe
Labeled syringe

Syringes also use a plunger. The plunger moves inside a tube called a barrel. It can pull in or push out liquid. In many syringes, the plunger is plastic. It has a rubber tip to make a seal. Musicians also use plungers. They use them to mute brass instruments like trumpets.

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