Where is the low-pressure side typically connected?

The low-pressure side is typically connected to the atmosphere, as this configuration allows for proper pressure management within a system. When connecting to the atmosphere, the system can naturally equalize pressure, which is essential for the effective operation of various components. For example, in many applications, maintaining a low-pressure environment is necessary to prevent equipment from becoming over-pressurized and to facilitate processes such as fluid flow and gas venting.

In systems involving tanks, connecting to the atmosphere allows for the release of gases and ensures that the liquid can flow freely without creating a vacuum effect, which can lead to operational issues. This connection is crucial for safety and efficiency in processes that deal with low-pressure fluids.

The other configurations presented, such as connecting at the bottom of the tank, the high point of the vessel, or near the pump outlet, are not standard practices for establishing a low-pressure side in a system, as they do not effectively provide the necessary atmospheric reference required for low-pressure operation.