Which of the following is true regarding vent pipe outlets for purging?

• A. They can be directed towards the building
• B. They must have an upward slope
• C. They must release gases indoors
• D. They must release gases outdoors

Answer: (D)

The requirement for vent pipe outlets to release gases outdoors is essential for safety and compliance with gas handling regulations. When venting gases, it is critical to ensure that they are directed away from occupied spaces to minimize the risk of harmful exposure to residents or personnel. Directing gases outdoors helps to disperse them into the atmosphere where they can dissipate without affecting indoor air quality. Proper outdoor venting prevents hazardous buildup of gases, which can lead to dangerous situations such as asphyxiation, fires, or explosions.

The other options do not conform to established safety protocols. Directing vent pipes towards the building would pose a substantial risk, allowing hazardous gases to enter indoor environments. An upward slope is not a requirement, as the primary focus is on ventilation to the outdoors rather than the angle of the pipe. Releasing gases indoors is clearly contrary to safety standards, as it can lead to dangerous conditions.