Mueller Streamline 5950 Pvc Dwv Hub Coupling Reducer

Product Description

The MUELLER STREAMLINE 5950 is a reducing hub coupling designed for PVC drain, waste, and vent (DWV) piping systems. It transitions from a 3-inch hub inlet to a 2-inch hub outlet, making it a standard fitting for reducing line size within a DWV stack or branch run. The fitting is manufactured from PVC material meeting ASTM D2665, F1498, D331, and D1784 specifications, delivering consistent dimensional integrity and chemical resistance. Smooth interior walls minimize flow restriction and resist scaling buildup. Licensed plumbers and pipefitters install this type of fitting during rough-in and repair work on residential and light commercial drain systems.

This coupling is suited for DWV applications where a pipe size reduction is required inline. Its hub-by-hub end connections accept PVC pipe solvent-welded at both ends, providing a secure, permanent joint. The fitting also carries ratings for chemical and corrosion-resistant applications, broadening its use to environments where aggressive drain chemistry is a factor. It conforms to NSF 14 and UPC standards, which are commonly required by local plumbing codes across North America.

Key Features

• Reduces 3-inch hub inlet to 2-inch hub outlet for inline pipe size transitions
• PVC construction resists chemicals and corrosion in DWV service
• Smooth interior walls promote free flow and reduce scaling
• Meets NSF 14 and UPC standards for plumbing code compliance
• Manufactured to ASTM D2665, F1498, D331, and D1784 material specifications
• Hub-by-hub end connections for solvent-weld installation

Compatibility

Designed as an OEM-style replacement and new-installation fitting for residential and light commercial PVC DWV piping systems where a 3-inch to 2-inch reducing hub coupling is required.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter in accordance with the applicable local plumbing code and IFGC requirements. Shut off water supply and confirm the drain system is depressurized and drained before cutting into existing pipe. Use an approved PVC primer and solvent cement rated for DWV service, applied per the cement manufacturer and ASTM instructions. Do not apply heat to make joint adjustments after solvent cement has been applied.

Technical Specifications

• Fitting Type: Pipe Increaser/Reducer, Reducing
• Size A (Inlet): 3 inches
• Size B (Outlet): 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: 5950