3/4 inch PEX Engineered Plastic Insert Coupling PEX x PEX

3/4" PEX x 3/4" PEX Uponor ProPEX Coupling – Expansion Fitting for Secure Connections

The 3/4" PEX x 3/4" PEX Uponor ProPEX Coupling is engineered for use with ASTM F1960 cold-expansion systems and provides a reliable, permanent connection between two PEX-A pipes. Manufactured from high-performance engineered polymer (EP), this coupling is compatible with Uponor PEX-a tubing and is designed for potable water distribution and hydronic applications.

The fitting utilizes the ProPEX expansion method, which creates a strong mechanical seal without the need for torquing or gluing. When installed with a ProPEX expansion tool and ring, the memory characteristics of PEX-a allow it to contract over the fitting, ensuring a tight, leak-resistant joint without the use of heat or chemicals.

Key Product Advantages

• Cold Expansion Joint Integrity: Utilizes the F1960 expansion method to form a durable, consistent seal as the pipe contracts over the fitting.
• Non-Metallic Construction: Made from high-strength engineered polymer (EP), which resists corrosion, scaling, and chemical degradation common in aggressive water conditions.
• High-Pressure Capability: Rated for up to 200 psi at 73°F and 100 psi at 180°F, suitable for residential and commercial applications.
• Standards Compliance: Meets or exceeds requirements of ASTM F1960, NSF/ANSI 14 and 61 (for potable water), and CSA B137.5.

Technical Specifications

• Material: Engineered Polymer (EP)
• Connection Method: ProPEX (ASTM F1960 cold expansion)
• Pipe Compatibility: PEX-a tubing only
• Nominal Size: 3/4" x 3/4"
• Pressure Rating: 200 psi @ 73°F, 160 psi @ 140°F, 100 psi @ 180°F

Application Considerations

This coupling is intended for use in both new construction and retrofit applications, including residential potable water supply, hydronic radiant heating, snow melt, and distribution piping. Proper tool selection is critical—only use compatible ProPEX expansion tools and rings for installation. This product is not suitable for crimp, clamp, or push-to-connect methods.

Installation Notes

Installers should ensure that all components (tubing, rings, and fittings) are clean and undamaged before assembly. Expansion tools must be calibrated per manufacturer recommendations. Proper insertion depth should be verified during install. No solvents, sealants, or adhesives are required.

Code Compliance

This fitting meets applicable plumbing and mechanical codes in all U.S. states where ASTM F1960 expansion systems are approved. Always verify with local authorities for jurisdiction-specific requirements.

The Uponor ProPEX 3/4" coupling provides a consistent, high-strength solution for joining PEX-a tubing in systems requiring secure, tool-assisted expansion joints. Its polymer construction and code-compliant design make it a reliable choice for demanding installations where corrosion resistance and joint durability are critical.