3/4 inch ProPEX Engineered Plastic Tee PEX x PEX x PEX

Uponor ProPEX EP Tee – Engineered for PEX System Integration

The Uponor ProPEX EP Tee is a high-performance fitting designed for efficient branching in PEX distribution systems. Fabricated from engineered polymer (EP), this tee provides long-term reliability in potable water and hydronic heating applications. Its ProPEX connection method ensures a secure, leak-resistant seal using expansion fittings compatible with ASTM F1960 standards.

This fitting is built to support professional-grade installations by offering dimensional consistency, ease of alignment, and corrosion resistance in aggressive water conditions. It is a core component in residential and commercial plumbing systems utilizing Uponor PEX-a tubing and ProPEX expansion technology.

Performance Advantages

• ✅ Engineered Polymer (EP) — Non-metallic construction resists corrosion, pitting, and scale formation commonly seen in metallic fittings.
• ✅ Uniform Expansion Compatibility — Designed exclusively for use with ProPEX expansion tools and rings, ensuring a cold-expansion connection that strengthens over time.
• ✅ Code Compliance — Certified to meet or exceed applicable industry and building standards for potable water distribution systems.
• ✅ Temperature and Pressure Rated — Suitable for hot and cold water applications in compliance with system design parameters.
• ✅ Application Flexibility — Frequently specified in both single-family and multifamily installations, as well as commercial domestic water and radiant systems.

Installation Considerations

Installation requires a PEX expansion tool and ProPEX rings. Ensure tubing and fittings are free from debris and fully expanded prior to insertion. This method eliminates the need for solder, adhesives, or crimp rings, and provides a secure mechanical joint without relying on O-rings or gaskets.

Technical Specifications

• Connection Size: 3/4 inch x 3/4 inch x 3/4 inch PEX
• Material: Engineered Polymer (EP)
• Connection Method: ProPEX Expansion
• Compliance: ASTM F1960, NSF/ANSI 61 & 14, and CSA B137.5

Typical Use Cases

Commonly used in residential and commercial plumbing layouts to create branches in PEX water distribution lines. The tee’s robust EP construction makes it suitable for slab, wall cavity, and ceiling installations in potable and radiant system designs.

Installation Insight

ProPEX connections utilize the shape memory of PEX-a tubing. As the tubing contracts over the expanded fitting and ring, it creates a tight, permanent joint. This method has been validated for long-term reliability in millions of installations globally.

Use the Uponor ProPEX EP Tee when cold-expansion PEX connections are required for a durable, code-compliant solution. Ideal for projects that demand corrosion resistance, structural stability, and efficient system layout.