Agri-Farm Products Hook Over Trough. The long trough hooks over pipes. Therefore, it is easy to lift up and wash out. Holding the same amount of feed, a smaller trough would increase feed waste. Our AFP-2000 Hook over trough thus reduces feed waste and is specially designed to ensure that no feed remnants are left in trough. This 2000 Trough has UV protection in order to ensure a long life and durability. It is produced from raw material and additives that are approved for food contact. Use the AFP-109 Feed Troughs inside to segment and divide the larger trough. (shown in picture).