SAIT 2nd Year Plumbing Practice Exam 2025 - Free Plumbing Practice Questions and Study Guide

Question: 1 / 400

Which of the following is a common reason for plumbing vent installation?

To regulate water temperature

To improve drainage performance

One of the primary functions of plumbing vents is to improve drainage performance. Vents are critical in maintaining proper air pressure within the plumbing system. When wastewater flows through the pipes, it creates a vacuum that can slow down or hinder drainage. Vents allow air to enter the system, equalizing pressure and promoting the smooth flow of water and waste. This ensures that fixtures drain properly and reduces the likelihood of gurgling sounds or slow drainage issues.

In addition, proper venting helps to prevent trap siphoning, where water is pulled from a trap due to negative pressure, leading to the potential for sewer gas to enter the living space. By ensuring efficient drainage through appropriate vent installation, plumbers help maintain a functional and safe plumbing system.

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To increase water quality

To protect against flooding

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