Mueller Streamline 5949 Pvc Dwv Hub Coupling Reducer

Product Description

The MUELLER STREAMLINE 5949 is a reducing hub coupling designed for drain, waste, and vent (DWV) piping systems. It transitions from a 3-inch hub connection to a 1-1/2-inch hub connection, making it a standard solution for residential and light commercial DWV rough-in work. Molded from PVC to ASTM D2665, F1498, D331, and D1784 material specifications, the fitting delivers consistent dimensional integrity for leak-free joints. Smooth interior walls minimize scaling and support unobstructed flow through the drain line. Plumbers and pipefitters are the primary trade installers for this fitting.

This fitting is suited for DWV applications where a pipe size reduction is required within a gravity-drain system. Its chemical and corrosion resistance also makes it appropriate for light-duty chemical drainage applications. The hub-by-hub end connections accept standard PVC DWV pipe at both ends, following NSF 14 and UPC compliance standards. Typical install scenarios include branch drain transitions, stack reductions, and fixture drain connections in residential and commercial construction.

Key Features

• Reduces from 3 inches to 1-1/2 inches — hub x hub end connections
• PVC construction resists corrosion and a broad range of drain-line chemicals
• Smooth interior walls promote free flow and resist scaling buildup
• Meets NSF 14 and UPC standards for DWV applications
• Manufactured to ASTM D2665, F1498, D331, and D1784 material specifications
• Consistent dimensional tolerances for reliable fit with standard PVC DWV pipe

Compatibility

Designed as an OEM-style replacement or new-installation fitting for PVC DWV piping systems requiring a 3-inch to 1-1/2-inch hub reducing coupling connection.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off water supply and ensure the drain system is depressurized before cutting into existing lines. Use appropriate PVC primer and solvent cement rated for DWV service when making hub connections. Do not apply flame or heat to seat the fitting.

Technical Specifications

• Fitting Type: Pipe Increaser/Reducer
• Configuration: Reducing
• Size A: 3 inches
• Size B: 1-1/2 inches
• End Connection: Hub x Hub
• Material: PVC
• Material Specification: ASTM D2665 / F1498 / D331 / D1784
• Application: DWV, Chemical, Corrosion Resistant
• Applicable Standard: NSF 14, UPC

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 5949