The vapor management requirement in the dispenser system states that vapor must be prevented from entering the meter before or during liquid transfer by what?

• A. Vapor Eliminator
• B. Check Valve
• C. Pressure Relief Device
• D. Flow Meter

Answer: (A)

Vapor management focuses on keeping vapor out of the meter so only liquid reaches it during transfer. A vapor eliminator creates a separation stage where incoming liquid propane is allowed to flow to the meter while the lighter vapor is vented away, typically through a vent path or chamber designed to capture and expel vapor before it can reach the metering device. This keeps the meter reading accurate and prevents vapor pockets from causing erratic flow or incorrect dispenses. The other components don’t perform this separation: a check valve blocks backflow but doesn’t remove or vent vapor; a pressure relief device protects against overpressure rather than managing vapor; a flow meter measures the liquid flow but doesn’t prevent vapor from entering the meter.