Check the listing for details. Multiplex S470-H4H4 CHECK VALVE SINGLE 1/4 BARB. Condition: New. Listed at 25.00 USD. The Multiplex S470-H4H4 Check Valve Single 1/4 Barb is a crucial component for commercial cold and frozen beverage dispensers, such as frozen drink and slush machines. This check valve ensures that the fluid flow is one-way, preventing leaks and allowing for easy maintenance. With a durable construction and precise fit, this product is essential for keeping beverages dispensed efficiently and effectively in professional settings.