The SharkBite UAB072LFA is a 1/2-inch PEX-A to 1/2-inch FNPT (female national pipe thread) expansion adapter, crafted from durable, lead-free DZR (dezincification-resistant) brass. Designed exclusively for use with PEX-A systems, this fitting requires a PEX expansion tool and an expansion ring to form a secure, full-bore connection. Once properly expanded, the connection tightens as the pipe and ring contract, ensuring long-term reliability. It is rated for a working temperature up to 160 deg. F at 73 PSI, and has a minimum working temperature of 33 deg. F at 160 psi. The UAB072LFA is fully certified for potable water and hydronic heating applications, meets ASTM F-1960 and F-877 standards, and is approved for direct-burial installations - including under concrete - making it a highly dependable choice for residential plumbing systems.