What system provides fresh water to the galleys and lavatory sinks and toilets?

The potable water system is specifically designed to supply fresh water to various areas of the aircraft, including the galleys, lavatory sinks, and toilets. This system ensures that the water provided is safe for consumption and meets health standards, allowing for food preparation and hygiene in the passenger and crew areas.

In contrast, other systems like the pneumatic, fuel, and hydraulic systems serve very different purposes. The pneumatic system is primarily involved in providing pressurized air for various aircraft functions, such as the operation of brakes and engine starting. The fuel system manages the storage and distribution of the aircraft's fuel. The hydraulic system is responsible for operating flight control surfaces and landing gear through hydraulic fluid pressure. Each of these systems plays a critical role in aircraft functionality, but only the potable water system addresses the need for fresh water throughout the cabin and lavatory areas.