The ProPEX Lead-Free (LF) Brass Male Threaded Adapter is approved for use in hot and cold domestic potable water systems as well as hydronic heating and cooling systems. The adapter connects Uponor PEX-a pipe to male NPT threads. The product features the NSF us-pw-G marking for compliance to state and federal lead-free requirements. Combine with Uponor PEX-a pipe, Uponor engineered polymer (EP) fittings, and Uponor ProPEX out-of-the-wall support systems for a complete lead-free solution from inlet to faucet without the need for torches, glues, solvents, gauges, or fire-watch requirements. Note that this product requires the use of a ProPEX expansion tool and ProPEX rings (sold separately) to make the ProPEX connection.