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The BSC PREFERRED LK43 is a drain fitting designed for kitchen, prep, bar, and laundry sink installations. The body is chrome-plated brass, offering corrosion resistance and durability in daily-use environments. It ships with a field-adjustable stainless steel strainer available in either a flat grid or dome configuration, both measuring 5-5/16 inches outer diameter. The tailpiece features a 3-5/8-inch inner diameter and a 4-inch outer diameter, connecting to standard 3-inch I.P.S. piping. Installation uses caulk or epoxy, making it adaptable to different mounting conditions. The outlet opening is sized for a 4-15/16-inch sink cutout. Licensed plumbers install this fitting as part of a complete sink drain assembly.
The LK43 suits residential and light commercial applications including kitchen sinks, prep stations, bar sinks, and laundry sinks. Its 3-inch I.P.S. outlet makes it compatible with standard waste drain lines found in these settings. The choice between a flat grid and dome strainer allows the installer to match the strainer profile to the sink bowl depth and intended use. The fitting is engineered to coordinate with BSC PREFERRED sink products, supporting a consistent installation when used within that product line.
Designed as an OEM-style replacement or new-installation drain fitting for kitchen, prep, bar, and laundry sinks using standard 3-inch I.P.S. waste drain piping. Coordinates with BSC PREFERRED sink products.
Installation should be performed by a licensed plumber in accordance with applicable IPC or local plumbing code requirements. Shut off the water supply and verify the drain line is clear before beginning work. Apply caulk or epoxy to the sink flange as specified by the sink manufacturer or local code. Do not over-tighten the strainer locknut, as this can crack the sink deck or distort the fitting body.
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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