The T&S Brass B-3952-01-XS is a reliable waste drain valve designed for efficient drainage in sinks with a 3-1/2" sink hole. It features a short twist handle for easy operation, allowing for quick opening and closing. The valve includes an overflow tube to prevent water overflow, ensuring safety and functionality. It is equipped with a 1-1/2" NPT female outlet and a 2" NPT male outlet, providing versatile installation options for various plumbing setups. This durable and practical drain valve is ideal for both commercial and residential applications.