Westlake dwv-d107-422 Dwv Flush Bushing 4x3 in Pvc

Product Description

The WESTLAKE PIPE FITTINGS dwv-d107-422 is a PVC flush bushing designed for drain, waste, and vent (DWV) piping systems. It transitions from a 4-inch spigot connection to a 3-inch hub connection, allowing a reduction in line size without the need for a separate coupling or adapter. The spigot end inserts directly into a standard 4-inch hub fitting, while the 3-inch hub end accepts standard PVC DWV pipe. This fitting is installed by licensed plumbers and experienced pipefitters during rough-in work and service repairs on residential and light commercial drain and vent systems.

This bushing is suited for use in gravity-drain applications where a reduction from 4-inch to 3-inch nominal pipe size is required within a DWV assembly. Typical installation scenarios include branch line reductions, closet flange transitions, and vent stack tie-ins. The flush bushing profile keeps the fitting compact and flush with the surrounding pipe assembly, which is useful in tight spaces behind walls or under slabs. Fittings of this type are commonly used in both new construction rough-in and retrofit drain line work.

Key Features

• PVC construction provides corrosion resistance and compatibility with standard DWV solvent-weld cement
• Spigot x hub end configuration allows direct insertion into an existing 4-inch hub fitting
• 4 x 3 inch nominal pipe size reduction in a single compact fitting
• Flush bushing design minimizes overall fitting length for use in confined spaces
• DWV-rated for drain, waste, and vent service

Compatibility

Designed as an OEM-style DWV fitting for use with standard 4-inch spigot and 3-inch hub PVC drain, waste, and vent piping systems.

Installation Notes

Installation is performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off water service and ensure the drain line is clear before beginning work. Surfaces must be clean, dry, and deburred before applying PVC primer and solvent-weld cement per the cement manufacturer instructions. Do not use this fitting for pressure piping applications.

Technical Specifications

• Material: PVC
• Nominal Pipe Size: 4 x 3 inches
• Connection Type: Spigot x Hub
• Service Type: DWV (Drain, Waste, Vent)
• UNSPSC Code: 40172308

Standard Information

• Brand: WESTLAKE PIPE FITTINGS
• Manufacturer Part Number: dwv-d107-422