What is the amount of space reserved for tank over-pressure from gas expansion?

The correct amount of space reserved for tank over-pressure from gas expansion is 20%. This percentage is crucial for ensuring the safety and proper functioning of gas tanks in recreational vehicles.

When gas is heated, it expands, which increases the pressure within the tank. To prevent over-pressurization that could lead to leaks or catastrophic failures, manufacturers design tanks with a specified headspace. The 20% headspace acts as a buffer, allowing for gas expansion while maintaining safe pressure levels. This ensures that the tank operates within its safe limits under various temperature conditions, thereby preventing potential hazards associated with gas expansion.

Understanding the appropriate headspace is essential for RV technicians as it informs them about safe practices and proper tank management when servicing or inspecting RV gas tanks.