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The COPPERFIT 1A1785 is a 3-inch ABS DWV long turn combination tee, commonly called a combo tee, designed for drain, waste, and vent piping systems. This fitting allows a branch connection while maintaining smooth, long-radius flow through the run, reducing the risk of blockages compared to sharp-turn fittings. It is manufactured from acrylonitrile butadiene styrene (ABS) plastic, which resists corrosion and chemical attack common in drain and vent service. Licensed plumbers install this fitting during rough-in and remodel work wherever a single fitting must handle both horizontal-to-horizontal and horizontal-to-vertical transitions in DWV piping.
This combination tee is suited for residential and light commercial DWV applications, including drain and vent rough-in for bathrooms, kitchens, and utility areas. The long-turn sweep geometry meets code requirements in jurisdictions that mandate a gradual change of direction in horizontal drain piping. It is a standard solvent-weld fitting compatible with 3-inch ABS DWV pipe and fittings per ASTM D2661 guidelines.
Designed as an OEM-style DWV replacement and new-installation fitting for use with 3-inch ABS drain, waste, and vent piping systems.
Installation is performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC) or applicable local amendments. Shut off water supply and ensure the drain line is empty before cutting into existing piping. Clean pipe ends and apply ABS solvent cement per manufacturer instructions, allowing full cure time before system pressure or flow is restored. Verify fitting orientation to maintain correct slope and flow direction before the cement sets.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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