Mueller Streamline ABSDBLY43 Abs Dwv Double Wye 45 Deg

Product Description

The MUELLER STREAMLINE ABSDBLY43 is a 45-degree double wye fitting made from ABS plastic for use in drain, waste, and vent (DWV) piping systems. It features a 4-inch by 4-inch main run with dual 3-inch branch outlets, all with hub (socket) connections. This fitting allows two branch lines to tie into a single main drain line at a 45-degree angle, reducing turbulence and promoting smooth wastewater flow. Licensed plumbers install this fitting in residential and light commercial DWV rough-in work where branching of multiple drain lines into a common stack or horizontal run is required.

This fitting is suited for above-ground residential and commercial DWV applications including bathroom groups, kitchen drain rough-ins, and multi-fixture drain configurations. The 45-degree geometry reduces the sharpness of flow transition compared to a standard 90-degree wye, making it a preferred choice when code or system layout calls for a low-sweep branch entry. All four openings use standard hub connections sized for 4-inch and 3-inch ABS pipe.

Key Features

• 45-degree double wye geometry allows two 3-inch branch lines to connect to a 4-inch main run in a single fitting
• Hub (socket) connections on all four ports for solvent-cement joints with standard ABS pipe
• ABS plastic construction provides chemical resistance and lightweight handling on the job
• Designed for DWV service — not rated for pressure supply lines
• Dual branch outlets simplify back-to-back or clustered fixture rough-in layouts

Compatibility

Designed as an OEM-style replacement and new-installation fitting for ABS DWV piping systems using 4-inch main run pipe and 3-inch branch pipe with hub connections.

Installation Notes

Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) or applicable local plumbing code. Shut off water service and ensure the drain system is clear before cutting into an existing line. Joints are made with approved ABS solvent cement applied to both the pipe end and the hub socket — follow manufacturer cure time instructions before restoring flow. Verify proper slope and support spacing per code after fitting installation.

Technical Specifications

• Material: ABS Plastic
• Connection Type: Hub (Socket) x Hub x Hub x Hub
• Main Run Size: 4 inches x 4 inches
• Branch Size: 3 inches x 3 inches
• Fitting Angle: 45 degrees
• Fitting Type: Double Wye
• Application: DWV (Drain, Waste, Vent)

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: ABSDBLY43