The NABCO PAPT040404 PEX Tee is a 3/4 inch plastic polymer fitting designed for creating a three-way connection in PEX plumbing systems. This tee features Crimpsert connections, also known as PEX barb connections, which are secured using a metal crimp ring for a leak-free seal. It is suitable for use with PEX-A, PEX-B, or PEX-C tubing, and is resistant to damage from chemicals and corrosive water conditions, making it an alternative to metallic fittings where copper is code-restricted or water quality issues are present. The fitting is tested and certified by NSF International, indicating compliance with health effects standards for potable water systems, and typically adheres to ASTM F2159 for plastic insert fittings. It is engineered for durability and corrosion resistance in both residential and commercial potable water distribution and hydronic heating applications.