What type of valve is utilized to direct sewage flow to either the tank or overboard?

A three-way ball valve is specifically designed to control the direction of flow in a system, making it ideal for directing sewage to either a holding tank or overboard discharge. This type of valve allows for efficient routing of fluids through multiple paths with minimal resistance, providing the necessary versatility to manage sewage flow effectively.

In applications involving sewage management, the ability to choose between directing waste to a holding tank for treatment or directly overboard for disposal is crucial. The three-way ball valve achieves this by allowing the operator to switch between the two paths swiftly, which is essential in maintaining operational efficiency and compliance with environmental regulations.

Other types of valves, such as check valves, gate valves, and pressure relief valves, serve different purposes. A check valve typically prevents backflow, a gate valve is used for fully opening or closing a line without regulating flow, and a pressure relief valve is designed to release pressure from a system to prevent over-pressurization. Therefore, they do not fulfill the requirement for directing sewage flow in the manner accomplished by a three-way ball valve.