Available in multiple sizes, these cast iron flap (or drainage) gates are an economical backflow solution for low head applications. They're typically mounted to headwalls or corrugated pipe and used to permit outflow/prevent backflow in reservoirs, tidal basins, storm drain systems, and more. We provide a flat back model ideal for headwall and flange mounting and a spigot back model perfect for corrugated pipe mounting. 
 
Some sizes are available for same day pickup. Call ahead to confirm size required and availability.