The 13A01-102 by WHITE LIGHTNING PRODUCTS is a hydronic zone valve. This zone valve is designed to provide reliable and efficient control of water flow in hydronic heating systems. With its 25V voltage, 3/4" SW connection, and two-way configuration, it ensures accurate and safe operation. Its NC auxiliary switch adds versatility for system integration. Whether you're a professional HVAC technician or a DIY enthusiast, this hydronic zone valve is a reliable choice for ensuring proper and efficient water flow control.