Provides a reliable transition between different pipe sizes in plumbing systems. The T&S Brass B-3945 Adapter is a threaded plumbing fitting designed to connect a 2-inch NPT female connection to a 1.5-inch NPT male connection. It works by securely threading into compatible pipes, creating a tight, leak-resistant seal without the need for complex modifications. This adapter is commonly used in commercial plumbing and water distribution setups where size reduction is required. Its brass construction offers durability and corrosion resistance, while simplifying installation and maintenance. The design helps improve system compatibility, reduces fitting inventory, and supports consistent flow performance in various applications.