What type is the Waste System on the B737-700?

What type is the Waste System on the B737-700?

• A. Vacuum system
• B. Gravity drain
• C. Liquid waste
• D. Compressed air

Answer: (A)

The Waste System on the 737-700 is vacuum-operated. Lavatories use vacuum toilets that rely on suction from a vacuum source to move waste through the piping into a holding tank. When you flush, a valve opens and the suction pulls the contents away, keeping the system sealed and odors contained. This setup works reliably in any flight attitude and during all phases of flight, which wouldn’t be as dependable with a gravity drain that depends on orientation. The idea of “liquid waste” describes what gets stored, not the method of transport, and compressed air isn’t the primary mechanism for this system on this aircraft.

The Waste System on the 737-700 is vacuum-operated. Lavatories use vacuum toilets that rely on suction from a vacuum source to move waste through the piping into a holding tank. When you flush, a valve opens and the suction pulls the contents away, keeping the system sealed and odors contained. This setup works reliably in any flight attitude and during all phases of flight, which wouldn’t be as dependable with a gravity drain that depends on orientation. The idea of “liquid waste” describes what gets stored, not the method of transport, and compressed air isn’t the primary mechanism for this system on this aircraft.