Westlake Pipe Fittings dwv-d102-422 Dwv Pvc Reducer Fitting

Product Description

The WESTLAKE PIPE FITTINGS dwv-d102-422 is a 4-inch by 3-inch PVC reducer fitting engineered for drain, waste, and vent (DWV) piping systems. It features two hub-style ends that accept standard pipe for solvent-weld connections. This fitting is rated for non-pressurized gravity-flow applications only and is not suitable for pressurized water supply lines. Plumbers and pipefitters use this reducer to transition between a 4-inch main line and a 3-inch branch or stub-out within residential and light commercial DWV systems.

This reducer fitting is used in new construction and retrofit DWV installations wherever a pipe size transition from 4 inches down to 3 inches is required. Typical applications include connecting a 4-inch soil stack or drain line to a 3-inch toilet flange takeoff, branch drain, or vent line. The hub-by-hub configuration allows a clean, solvent-welded transition that meets standard residential and commercial drain-waste-vent layout requirements.

Key Features

• 4-inch by 3-inch pipe size transition for DWV gravity-flow systems
• Hub-style ends on both sides accept standard PVC pipe for solvent-weld connection
• PVC construction resists corrosion, chemical degradation, and buildup common in drain and waste service
• Non-pressurized DWV rating — not for use on supply or pressurized lines
• Suitable for residential and light commercial drain, waste, and vent installations

Compatibility

Designed as an OEM-style replacement and new-installation fitting for non-pressurized residential and commercial PVC drain, waste, and vent piping systems using standard 4-inch and 3-inch DWV pipe.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters in accordance with the International Plumbing Code (IPC) and applicable local codes. Before cutting into any existing drain line, confirm the system is out of service and drained. Use PVC primer and solvent cement rated for DWV applications, applied per the cement manufacturer's instructions, to ensure a leak-free hub connection. This fitting is not rated for pressure testing above standard DWV gravity-flow conditions.

Technical Specifications

• Inlet Size: 4 inches
• Outlet Size: 3 inches
• End Type: Hub x Hub
• Material: PVC
• Application: Drain, Waste, and Vent (DWV) — non-pressurized only

Standard Information

• Brand: WESTLAKE PIPE FITTINGS
• Manufacturer Part Number: dwv-d102-422