10-12mm barbed Bulkhead Fitting Elbow, complete with ½" BSP nut and washer. Used to add a hose connection to fresh and waste water tanks. Produced in a food safe material suitable for fresh water. Used for feeding a flexible hose through the bulkhead in hot and cold water systems for campervans, motorhomes, caravans, and boats. A suitable hole size is required, approximately 21mm.