Baltimore Aircoil (BAC) 280046 Float Ball is a durable water-level control component designed to maintain the proper water level in evaporative HVAC systems. It operates by floating on the water surface and automatically opening or closing the connected valve as the water level changes, ensuring consistent system performance. Commonly used in BAC cooling towers and evaporative condensers, this float ball helps prevent water overflow and low-water conditions. Its reliable operation supports efficient heat transfer, reduces maintenance needs, protects equipment from water-related issues, and contributes to dependable, energy-efficient HVAC system performance.