Which of the Following Is a One-Way Check Valve That

question 2

Multiple Choice

Which of the following is a one-way check valve that allows air to flow into the piping system without letting any of the sewer gasses leave the DWV system?

• A)air break
• B)air gap
• C)AAV
• D)dry vent

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Definitions:

National Ambient Air Quality Standards

Standards established by the United States Environmental Protection Agency under the Clean Air Act that apply for outdoor air throughout the country.

EPA

The Environmental Protection Agency (EPA) is a U.S. federal agency responsible for protecting human health and the environment by enforcing regulations based on laws passed by Congress.

Clean Air Act

A federal law in the United States aimed at controlling air pollution on a national level by authorizing the Environmental Protection Agency (EPA) to establish standards for harmful pollutants.

National Ambient Air Quality Standards

Established by the United States Environmental Protection Agency to limit pollutants in the air to protect public health and the environment.