Indoor Custom Water Feature Ideas - This is an excellent example of the type of water feature that the expert builders at Water Feature Supply can create. Our fountain engineers have the experience and knowledge to help create your custom water wall project bringing even your wildest dream into reality. Every one of our custom water features is hand built with the finest quality materials in the world and fully tested to ensure longevity. This most beautiful, modern and custom water feature is made by the builders at Water Feature Supply.