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The MUELLER STREAMLINE DWV45L112 is a 45-degree elbow fitting designed for drain, waste, and vent (DWV) piping systems. It features a cup-by-cup (C x C) end configuration and is manufactured from wrot copper, which is formed through an extrusion and drawing process that produces a dense, uniform grain structure. At 1-1/2 inches in diameter, this elbow is sized for common residential and light commercial DWV branch lines. Licensed plumbers use this fitting to redirect waste flow at a gradual 45-degree angle, reducing turbulence compared to sharper bends and supporting proper drainage slope requirements.
This fitting is appropriate for residential and light commercial drain, waste, and vent piping installations. It is soldered into copper DWV systems using standard sweat-soldering technique, making it a routine component in bathroom, kitchen, and utility drain rough-in work. The C x C end configuration accepts standard copper pipe on both ends, allowing integration into new construction or retrofit plumbing layouts where a 45-degree change of direction is required in a 1-1/2-inch line.
Designed as an OEM-style replacement and new-construction fitting for 1-1/2-inch copper DWV piping systems using cup-by-cup sweat connections.
Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off the water supply and drain the affected lines before cutting into an existing system. Clean pipe ends and fitting cups thoroughly with emery cloth and apply flux before soldering to ensure a complete, leak-free joint. Do not use this DWV fitting in pressurized supply lines; it is rated for gravity-drain and vent applications only.
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