Good news! we are pround to published our update version 750GPH and 1100GPH non-auto bilge pump. Here are the modify advantage parts for you reference. 1,Installation improved. Consider to marine bilge pump installation conveniently, we add the installation hole,it can let pump pumping stable. 2,Flow efficient improved. Enlarge the water inlet/outlet flow range,it can increase 20GPH than old model before. 3,material& design improved. Choose new PP material manufacture improve the products performance. What's more, the color can be customized as per customers requirements.