Westlake Pipe Fittings dwv-d107-420 Flush Dwv Bushing

Product Description

The WESTLAKE PIPE FITTINGS dwv-d107-420 is a flush-style PVC bushing designed for drain, waste, and vent (DWV) piping systems. It reduces a 4-inch pipe to a 2-inch connection using a spigot-by-hub end configuration. The spigot end inserts into an existing 4-inch hub fitting, while the 2-inch hub end accepts standard DWV pipe. Manufactured from PVC, this bushing is suited for gravity-flow drainage applications in residential and light commercial plumbing. Licensed plumbers and pipefitters install this fitting as part of DWV rough-in work.

This fitting is used in drain, waste, and vent systems where a reduction from 4-inch to 2-inch nominal pipe size is required. Typical applications include branch connections, stack reductions, and fixture drain tie-ins in residential or light commercial construction. The flush bushing profile keeps the fitting seated flush within the receiving hub, maintaining a clean transition without protruding shoulders that could interfere with adjacent fittings or tight spaces.

Key Features

• Flush bushing design seats fully within a 4-inch hub for a compact, clean transition
• Spigot x Hub end configuration for straightforward solvent-weld installation
• Nominal reduction from 4 inches to 2 inches for DWV branch and stack applications
• PVC construction provides resistance to common drain waste and chemical exposure
• Rated for DWV service — not for pressure applications

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial PVC DWV piping systems using standard 4-inch and 2-inch nominal pipe sizing.

Installation Notes

Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) or applicable local plumbing codes. Solvent-weld the spigot end into the receiving 4-inch hub using PVC primer and solvent cement rated for DWV fittings. Shut off water supply and ensure the line is fully drained before cutting into an existing system. Allow full cure time per the cement manufacturer instructions before restoring flow.

Technical Specifications

• Material: PVC
• Nominal Pipe Size: 4 x 2 inches
• End Connection: Spigot x Hub
• Application: Drain, Waste, and Vent (DWV)
• UNSPSC Code: 40172308

Standard Information

• Brand: WESTLAKE PIPE FITTINGS
• Manufacturer Part Number: dwv-d107-420