Which method is used to pull fish line in 4" and 5" feeder ducts over 300'?

The compressor method is effective for pulling fish line through long runs of ductwork, especially in situations where the duct size is 4 inches or 5 inches and the distance extends over 300 feet. This method utilizes compressed air to assist in the process, allowing for a smoother and more efficient traversal through the ducts. The air pressure generated by the compressor can help to overcome resistance and friction that might be encountered over long distances, ensuring that the fish line is not only pulled through easily but also reduces the risk of damage to the line or duct.

In contrast, the other methods may not be suitable for this specific scenario. For example, the gravity method relies on the natural pull of gravity and is typically more effective when the duct run is vertical or requires a minimal horizontal distance. The manual pull method involves physical labor, which can be challenging and inefficient over lengthy distances, particularly in long ducts where friction can be significant. The cable winch method, while effective in other contexts, may not provide the finesse or control needed in tighter ducts compared to the compressor method, which is specifically designed for such applications. Thus, the compressor method stands out as the most advantageous for pulling fish line in this situation.