The Component Hardware Group DBN-X008 Overflow Cap is a 1-1/4" cap designed to prevent overflows in plumbing systems. It's typically used in sinks, drains, and other fixtures to manage excess water. This cap ensures that water levels remain controlled, preventing spills and potential water damage. Its design allows for easy installation and reliable performance. https://partsfe.com/dbn-x008-overflow-cap-1-1-4