The AllPoints Foodservice Parts & Supplies 56-1326 is a high-quality vacuum relief valve designed for hot water and steam applications. This 1/2" pressure-reducing valve is constructed from durable cast iron, ensuring long-lasting performance and reliability. It features a 1/2" male pipe thread (MPT) connection for easy installation. This valve is a direct replacement for the Stero P621170, making it an ideal choice for maintaining your equipment's efficiency. Perfect for foodservice environments, it helps regulate pressure and prevent vacuum conditions, enhancing safety and functionality.