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The MUELLER STREAMLINE PDWVCOMBY3 is a 3-inch long-radius combination tee-wye fitting designed for drain, waste, and vent (DWV) piping systems. This hub-by-hub-by-hub fitting combines the flow characteristics of both a tee and a wye in a single casting, allowing branch connections while maintaining smooth, low-turbulence drainage flow. The long-radius sweep reduces the likelihood of clogging and supports proper drain slope in residential and light commercial drain systems. Licensed plumbers install this fitting during rough-in or drain repair work.
This fitting is suited for residential and light commercial DWV applications, including horizontal drain runs and vent stack connections. The hub connections accept standard pipe ends for a solvent-welded joint. It is typically used where a branch takeoff is needed on a horizontal drain line or where the system design calls for a combination fitting to reduce the number of individual fittings in a run. Installation must conform to applicable plumbing codes, including IPC and local amendments.
Designed as an OEM-style replacement or new-installation fitting for 3-inch DWV piping systems using hub-end solvent-weld connections.
Installation should be performed by a licensed plumber in accordance with the applicable IPC or locally adopted plumbing code. Shut off the water supply and confirm the drain line is clear before cutting into an existing system. Use the appropriate PVC or ABS primer and solvent cement rated for the pipe material being joined. Support the fitting and adjoining pipe per code-required spacing to prevent sag and maintain proper drain slope.
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