The Polaris® Feed Hose Nut (D15), commonly referred to as mender nut, is white in color and is a factory part built specifically for Polaris® pressure-side pool cleaners - the global leader in pressure cleaning. The Polaris® D15 Feed Hose Nut is designed to secure the hose swivel to the feed hose. Refer to the Polaris® cleaner owner’s manual for maintenance tips and troubleshooting.