The GWIV on the 787-8 is the Gray Water Interface Valve. What is its primary function?

The GWIV on the 787-8 is the Gray Water Interface Valve. What is its primary function?

• A. It automatically vacuums out the sink if near full
• B. It routes gray water to the waste line
• C. It monitors gray water levels
• D. It isolates the gray water system from the rest of the galley

Answer: (A)

The main idea here is how gray water is moved from the galley to the waste system. The Gray Water Interface Valve is there to control that flow, acting as the bridge between the sinks’ drainage and the waste plumbing. Its primary job is to route gray water to the waste line while preventing unwanted backflow or cross-contamination into other systems. It’s not a vacuum device and it doesn’t monitor water levels; those tasks are handled by separate components in the system. So the valve’s essential function is to manage and direct gray water discharge into the waste line, coordinating with the pump and piping to ensure proper drainage.

The main idea here is how gray water is moved from the galley to the waste system. The Gray Water Interface Valve is there to control that flow, acting as the bridge between the sinks’ drainage and the waste plumbing. Its primary job is to route gray water to the waste line while preventing unwanted backflow or cross-contamination into other systems. It’s not a vacuum device and it doesn’t monitor water levels; those tasks are handled by separate components in the system. So the valve’s essential function is to manage and direct gray water discharge into the waste line, coordinating with the pump and piping to ensure proper drainage.