Uponor Q4751313 Pex Tee Fitting 1-1/4 Inch

Product Description

The UPONOR Q4751313 is a 1-1/4 inch PEX tee fitting constructed from modified polyphenylsulfone (MPPSU), a high-performance thermoplastic known for its resistance to elevated temperatures and chlorinated water. This tee is designed for use in PEX piping systems, providing a three-way branch connection in potable water distribution and hydronic heating applications. Licensed plumbers and mechanical contractors install this fitting as part of UPONOR's ProPEX or compatible expansion-style PEX systems. The MPPSU material offers a lead-free construction suitable for domestic water service, meeting the requirements of modern plumbing codes.

This tee fitting is suited for residential and light commercial plumbing installations where 1-1/4 inch PEX pipe is used for main distribution lines, branch manifolds, or hydronic loop connections. Its domestic designation indicates it is manufactured for use in potable water systems within the United States. The 1-1/4 inch size makes it appropriate for higher-flow trunk lines feeding multiple fixtures or zones.

Key Features

• 1-1/4 inch nominal size for main distribution and high-flow branch lines
• Modified polyphenylsulfone (MPPSU) construction — lead-free and suitable for potable water
• Three-way tee configuration for branching PEX runs
• Compatible with PEX piping systems standard to the 1-1/4 inch connection size
• Domestically sourced product designation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch PEX piping systems using UPONOR-compatible expansion or fitting connection methods.

Installation Notes

Installation of PEX fittings should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off the water supply and depressurize the line before cutting into existing piping. Use the correct expansion tool or fitting tool specified for the connection type to ensure a proper, leak-free joint. Do not over-bend PEX tubing at the fitting connection, as kinking near the fitting can compromise the joint.

Technical Specifications

• Connection Size: 1-1/4 inches
• Pipe Type: PEX
• Material: Modified Polyphenylsulfone (MPPSU)
• Configuration: Tee
• Application: Domestic Potable Water

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4751313