The Uponor Q4771513 ProPEX EP Reducing Coupling is a high-performance fitting designed to securely connect 1-1/2" and 1-1/4" PEX piping in residential or commercial plumbing and hydronic applications. Made from durable engineered polymer (EP), this coupling offers corrosion resistance and long-term reliability.It features Uponor’s proven ProPEX expansion connection system, delivering a strong, leak-resistant seal without the need for solder, glue, or clamps. Compatible with PEX-a and hePEX plus tubing, this fitting is suitable for potable water systems and radiant heating applications.Key Specifications:
- Connection Size: 1-1/2" x 1-1/4"
- Material: Engineered Polymer (EP)
- Length: 3-1/2"
- Width: 2.13"
- Max Operating Temperature: 210°F
- Max Pressure: 150 psi
- Connection Type: ProPEX expansion fitting
- Tubing Compatibility: PEX-a, hePEX plus
- Standards: ASTM F1960, CAN/CSA B137.5, ASTM F877
- Warranty: 25-Year Limited

