The T&S Brass B-3990-3X is a modular waste drain valve designed for efficient drainage in commercial and industrial sinks. It features a pull handle for easy operation and accommodates a 3-1/2" sink opening. The valve includes a 2" NPT female and a 1-1/2" NPT male adapter for versatile installation options. Additionally, a 3" handle extension is provided for enhanced accessibility and convenience. This durable and reliable drain valve ensures optimal performance and ease of use in any setting.