Water Transfer Connection (Part Number: 3917394) is a component manufactured by Cummins®, a renowned manufacturer in the automotive industry. The Water Transfer Connection is a specialized fitting used to facilitate the transfer of coolant or water in a commercial truck's cooling system. It is designed to securely connect the water lines, ensuring a reliable and leak-free connection. This component plays a crucial role in maintaining optimal engine temperature and preventing overheating, thereby enhancing the overall performance and longevity of the truck's engine.