Which of the following components must be vented in a sewage system?

The necessity for venting within a sewage system is crucial for ensuring that gases do not build up and create hazardous conditions. Each component in the system plays a role that can contribute to pressure changes and the release of sewer gases.

Holding tanks require venting to allow for the release of gases generated by the decomposition of waste. Without proper venting, pressure can build up in the tank, potentially leading to leaks or structural failure, as well as unpleasant odors in the living space.

Pipes and hoses also need to be vented properly. If these components are not adequately vented, pressure differentials can occur leading to siphoning of wastewater or the buildup of gases that might escape into living areas or create pressure-related issues elsewhere in the system.

When it comes to a sewage y-valve, which directs flow between different components of the sewage system, proper venting is critical as well. If the y-valve is not vented, it can lead to backpressure that affects the flow and functionality of the entire sewage system.

As all these components must work together without obstruction or buildup of harmful gasses, proper venting of the entire system is essential to maintain safety, efficiency, and hygiene. Therefore, the answer reflecting that all components must be vent