Mueller Streamline 5951 Pvc Dwv Reducing Hub Coupling 4x2 in

Product Description

The MUELLER STREAMLINE 5951 is a reducing PVC DWV hub coupling designed to transition from a 4-inch pipe to a 2-inch pipe in drain, waste, and vent systems. This hub x hub fitting is molded from PVC to ASTM D2665, F1498, D331, and D1784 material specifications, delivering strong chemical and corrosion resistance along with the rigidity required in residential and commercial DWV installations. Smooth interior walls minimize scaling and support unrestricted flow. Licensed plumbers install this type of fitting when connecting dissimilar pipe diameters in gravity-drain applications.

This reducing coupling is suited for DWV applications including drain, waste, and vent piping where a 4-inch line must reduce to a 2-inch line. Its chemical resistance also makes it appropriate for certain chemical-handling drain systems. The hub x hub end connection accepts standard PVC pipe ends with solvent-cement joints. It meets NSF 14 and UPC requirements, making it suitable for use in residential and commercial plumbing systems where those standards apply.

Key Features

• Reducing hub x hub configuration transitions 4-inch to 2-inch pipe without additional adapters
• PVC construction resists chemicals and corrosion in DWV service
• Smooth interior walls reduce scaling and promote free flow
• Meets NSF 14 and UPC standards for plumbing system compliance
• Manufactured to ASTM D2665, F1498, D331, and D1784 material specifications

Compatibility

Designed as an OEM-style replacement fitting for PVC DWV piping systems requiring a 4-inch to 2-inch hub x hub reducing connection in drain, waste, vent, and compatible chemical-drain applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable 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. Solvent-cement joints require proper cleaner and primer application followed by the appropriate PVC cement; allow full cure time before restoring flow. Do not use this fitting on pressurized supply lines.

Technical Specifications

• Fitting Type: Pipe Reducer (Increaser/Reducer)
• Configuration: Reducing
• Size A: 4 inches
• Size B: 2 inches
• End Connection: Hub x Hub
• Material: PVC
• Material Specification: ASTM D2665 / F1498 / D331 / D1784
• Applicable Standards: NSF 14, UPC
• Application: DWV, Chemical, Corrosion

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 5951