1/2 inch PEX Engineered Plastic Tee PEX x PEX x PEX

1/2" PEX EP Tee – Engineered Polymer Fitting for Potable Water Distribution Systems

The 1/2" PEX EP Tee is a durable, injection-molded engineered polymer fitting designed for use in cross-linked polyethylene (PEX) potable water piping systems. It provides a reliable branch connection between three PEX lines, supporting both new construction and retrofit plumbing installations. This tee is part of the ASTM F1807 or F2159 fitting families, depending on system design requirements.

Constructed from engineered polymer (EP), this fitting offers high resistance to chemical degradation, temperature cycling, and mechanical fatigue. It is rated for continuous use in hot and cold water supply systems and is designed to meet national and international plumbing standards for dimensional compatibility and lead-free compliance.

Technical Specifications

• ✅ Nominal Size: 1/2 inch (PEX x PEX x PEX)
• ✅ Material: Engineered polymer (EP), ASTM F2159 compliant
• ✅ Pressure Rating: 160 psi at 73.4°F / 100 psi at 180°F / 80 psi at 200°F
• ✅ Connection Method: Cold expansion with PEX reinforcement ring (ASTM F1960) or crimp/clamp (ASTM F1807/F2159, depending on system type)
• ✅ Standards: NSF/ANSI 14, NSF/ANSI 61, NSF/ANSI 372 (lead-free), ASTM F877

Performance Features

• ✅ Corrosion-Resistant – Non-metallic body eliminates the risk of corrosion or dezincification common with brass components
• ✅ High Chemical Resistance – Suitable for chlorinated water and treated systems
• ✅ Dimensional Stability – Maintains structural integrity under pressure and temperature fluctuations
• ✅ Secure Fit – Engineered to ensure a leak-resistant seal when properly installed with system-approved tools and components

Installation Guidelines

Install using approved PEX connection methods consistent with local code and system design (e.g., ASTM F1807 or ASTM F1960). Use a calibrated crimp, clamp, or expansion tool per manufacturer specifications. Ensure tubing is cut square, fully inserted to fitting shoulders, and secured with appropriate ring type. Verify connections via visual inspection and system pressure testing prior to operation.

Common Applications

The 1/2" PEX EP Tee is used to branch potable water supply lines within residential and multifamily buildings. Typical locations include fixture groups such as bathroom sinks, toilets, and kitchen supply lines. It is compatible with both home-run and trunk-and-branch system layouts.

Material Advisory

Engineered polymer PEX fittings are not suitable for use in compressed air or fuel gas systems. Use only in applications that conform to the fitting’s rated temperature and pressure limits as defined by ASTM and NSF standards.

The 1/2" PEX EP Tee delivers long-term reliability and corrosion-free service in modern PEX water distribution systems, ensuring code-compliant, maintenance-friendly plumbing layouts.