The T&S Brass B-3992 is a modular waste drain valve designed for efficient drainage in sinks. It features a 3-1/2" sink opening, ensuring compatibility with standard sink sizes. The valve includes a 2" NPT male outlet and a 1-1/2" female outlet, providing versatile installation options. Its lever/twist operation allows for easy control of water flow, making it a practical choice for both commercial and residential applications. Constructed for durability, this waste drain valve is an essential component for reliable sink drainage.