A Top Mount Workstation Sink Built for Serious Prep
The Karran QTWS-875 is a large single bowl quartz workstation sink that drops into an existing or new countertop cutout and transforms the space above the bowl into a functioning prep and cleanup station. Its integrated ledge supports a set of sliding accessories so the work happens over the sink, not around it, keeping the counter clear.
Key Features
• Top mount installation fits new and existing countertops in virtually any countertop material, with the rim resting on the surface.
• Integrated workstation ledge is formed into the sink rim and supports sliding accessories without any added hardware.
• Quartz composite construction combines 80% natural quartz crystals and 20% high-performance acrylic resin for a surface that is highly scratch, stain, chip, and heat resistant.
• Extra-large single bowl at 33 by 22 by 9 inches gives the wash area room for large pots, sheet pans, and full-sized cutting boards.
• Gray finish is a neutral complement to a wide range of countertop colors and cabinet finishes.
• Includes prep and cleanup accessories that slide along the ledge over the bowl for an organized, efficient workflow.
Where the Ledge Changes How You Work
Most kitchen renovations treat the sink as the endpoint of a prep workflow. The QTWS-875 makes it the center. The integrated ledge runs along the rim and accepts the included accessories in any order: slide the cutting board over while you wash vegetables, move it aside for the colander, then spread the drying rack across while the cookware drips dry. The bowl's extra depth keeps splash contained, and the single uninterrupted basin handles oversized cookware without a divider in the way. For cabinet shops fitting out a residential kitchen, this configuration answers the client's practical question — where does the work actually happen — with something built into the sink itself.
Quartz That Handles the Workload
The bowl and ledge are molded from quartz composite: 80% natural quartz bound in 20% acrylic resin. That ratio produces a surface that resists the scratches from daily prep work, the stains from coffee and wine, and the heat from pots pulled off the range. The Gray color runs through the full depth of the material, so normal use does not expose a different-colored core. The matte texture is uniform across the ledge and the bowl walls, and it holds up without polishing or sealing. This is not a surface that needs much attention — which is a practical point for any client who wants a kitchen that looks good under real conditions, not just in the showroom.
Right for Renovation-Minded Buyers and Working Kitchens
The top mount configuration is what makes the QTWS-875 accessible to the broadest range of projects. Drop-in installation works on laminate, stone, quartz, and solid surface countertops, and it does not require the underside to be finished or epoxy-coated for visibility. Homeowners replacing an existing drop-in sink can use the original cutout as a starting point. Designers specifying for a client who wants workstation functionality without an undermount installation will find this a straightforward specification. Cabinet shops and contractors running a first-time install benefit from a mount type that fits a wide range of job-site conditions. The single bowl layout in Gray is an especially versatile specification when the countertop color has not been finalized.
Frequently Asked Questions
Does the top mount rim cover the countertop cutout edge?
Yes. The rim rests on the countertop surface and its perimeter covers the cut edge, which is one of the reasons drop-in installation works well on laminate — the trim cut does not need to be finished.
What accessories are included with the QTWS-875?
This sink is described as shipping with accessories as part of the workstation pack. Confirm the exact component list — grid, basket strainer, cutting board, colander, and drying rack — against the packing slip or product spec sheet, as Karran's included accessory sets are stated per model and can vary.
Can I use this sink with a garbage disposal?
A single bowl configuration is generally compatible with a disposal unit mounted to the drain opening. Verify clearance between the disposal body and the base cabinet before ordering.
Is the drain included, or do I need to order one separately?
A drain assembly is not included with the bare sink. If this SKU ships as part of a pack that includes basket strainers, those are listed with the pack contents. For installation, a separately purchased basket strainer or drain flange sized for a standard kitchen drain opening is required.
What countertop materials work with top mount installation?
Top mount installation is compatible with laminate, stone, quartz composite, and solid surface countertops. The rim sits on the surface and clips secure the sink from below, making it a practical fit across most residential countertop materials.
A Workstation Sink That Earns Its Space
The QTWS-875 delivers a full prep-and-cleanup station in a drop-in format that installs cleanly into the widest range of kitchens and countertop materials. The Gray quartz composite bowl is built to take daily use and stay presentable, and the integrated ledge puts prep work exactly where cleanup happens.
