This Union Nut is manufactured by Gecko Aqua-Flo. At Gecko, understanding the spa user’s environment and expectations is key in the process of designing and making the perfect control systems, intuitive keypads, powerful but efficient pumps and value-added accessories for spas. When a user touches a button, presses a key or clicks on a link, he already expects how his spa, the product of our customers, should respond to his commands. He is validating, at each interaction, the quality of the experience he associates with his spa. 25 years of experience in the design and manufacturing of interfaces and controls of all types have made us experts in product interaction and user behavior. Simplicity, intuitivity, elegance and performance are not only starting points of design projects but driving forces of our creativity.