Brass Union Connectors: Complete Guide for 1/2″ Plumbing Adapters

What Exactly Is a 1/2″ Brass Union Connector? A brass union connector is a three-piece plumbing fitting that allows two pipes to be joined—and easily disconnected—without rotating either pipe. The “1/2″” designation refers to the nominal pipe size (NPS), which corresponds to a 0.5-inch internal diameter standard in US plumbing systems. Unlike standard couplings, unions…