Mueller Streamline 5952 Pvc Dwv Hub Coupling Reducer

Product Description

The MUELLER STREAMLINE 5952 is a 4-inch by 3-inch PVC reducing hub coupling designed for drain, waste, and vent (DWV) piping systems. This pipe increaser/reducer fitting transitions between a 4-inch hub inlet and a 3-inch hub outlet using a hub x hub end connection. Molded from PVC meeting ASTM D2665, F1498, D331, and D1784, the fitting resists chemical attack and corrosion while delivering consistent dimensional integrity for a leak-free joint. Smooth interior walls minimize scaling and support unobstructed flow through the drain line.

This fitting is suited for residential and light commercial DWV installations where a pipe size reduction is required within a gravity-flow drain or vent stack. It is also appropriate for chemical-drainage applications where PVC is the specified material. Licensed plumbers and pipefitters install this coupling as a standard part of sanitary or storm drain piping assemblies built to UPC and NSF 14 requirements.

Key Features

• Reduces from 4 inches to 3 inches in a single hub x hub fitting
• PVC construction resists chemicals and corrosion for long service life
• Smooth interior walls prevent scale buildup and support free flow
• Meets ASTM D2665, F1498, D331, and D1784 material specifications
• Listed to NSF 14 and UPC standards for potable-water and drain applications
• Consistent dimensional integrity for reliable solvent-weld joints

Compatibility

Designed as an OEM-style replacement or new-installation fitting for PVC DWV piping systems requiring a 4-inch to 3-inch hub x hub reducing coupling.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the applicable plumbing code, such as the Uniform Plumbing Code (UPC) or International Plumbing Code (IPC). Before cutting into an existing drain line, shut off water supply and clear the line of flow. Use an appropriate PVC primer and solvent cement rated for DWV service, and allow full cure time before returning the system to service. Do not apply flame or mechanical force to seat the hub joint.

Technical Specifications

• Fitting Type: Pipe Increaser/Reducer
• Reduction Type: Reducing
• Size A (Inlet): 4 inches
• Size B (Outlet): 3 inches
• End Connection: Hub x Hub
• Material: PVC
• Material Specification: ASTM D2665, F1498, D331, D1784
• Applicable Standards: NSF 14, UPC
• Application: DWV, Chemical, Corrosion-Resistant Drainage

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 5952