This Lochinvar gas valve is a crucial component designed for regulating the flow of gas in a heating system. It features a flange design and has a 1/2 inch National Pipe Thread (NPT) size, which is an industry standard for pipe fittings. The valve is also designed to operate at a 90-degree angle, providing flexibility in installation and use. The product number for this specific model is 100163054. Lochinvar, as a manufacturer, is known for its high-quality heating equipment parts and this gas valve exemplifies their commitment to durability and efficiency.