Concrete Tone and Countertop-Ready Depth
The Karran QU-820 is a quartz composite undermount kitchen sink in a 24-3/8 by 19-1/8 inch footprint, built for single-bowl work at a 9-inch depth. Its Concrete color brings a warm, neutral grey tone that complements both light and dark stone or solid surface countertops, making it a natural fit for kitchens where finish coordination matters as much as function.
Key Features
• 80% quartz, 20% acrylic resin construction delivers a dense, durable bowl that is highly resistant to scratches, stains, chips, and heat in daily kitchen use.
• Undermount installation with a flat mounting rim allows the countertop edge to sit cleanly over the bowl, leaving no exposed rim from above.
• 9-inch bowl depth provides substantial working clearance for large pots, sheet pans, and cutting boards rinsed at the sink.
• No faucet deck on the bowl means the faucet, soap dispenser, and any accessories mount through the countertop itself, keeping the sightline clean.
• Concrete color finish offers a muted, architectural grey tone that pairs with quartz, granite, and solid surface countertop materials.
• Single bowl configuration gives the full interior footprint to one uninterrupted workspace without a divider.
Where This Sink Earns Its Place
An undermount quartz sink is the right call when the countertop edge is the focal point of the kitchen. Because the QU-820 mounts beneath the counter, the stone, quartz slab, or solid surface deck runs uninterrupted to the bowl edge, and cleanup is a straight wipe off the counter into the basin. The single bowl layout removes the divider entirely, which matters when a household does a lot of hand-washing of large cookware, or when a cabinet shop spec is building a sink station that needs maximum unobstructed basin room. The Concrete color reads as a neutral ground under most countertop palettes — paired with white quartz it adds quiet contrast; under a dark slab it holds its own without competing.
At 24-3/8 inches, this is a compact-to-mid single bowl, not an oversized basin. It suits kitchens where the run of counter real estate is limited but a full 9-inch depth is still needed, and it works well in secondary kitchen positions such as an island or a prep station alongside a larger primary sink.
Quartz Composite: What the Material Delivers
Quartz composite is not cast acrylic and it is not stone — it is a purpose-built sink material. Karran's formula is 80% natural quartz crystals bound in 20% high-performance acrylic resin. The result is a dense, non-metallic bowl that absorbs sound better than stainless steel and resists the surface damage that ceramic and porcelain are prone to from dropped utensils. The Concrete finish runs through the material, so minor surface contact does not reveal a different color underneath. The QU-820 does not include a template or mounting clips — these are specified and sourced per the countertop fabricator's method and countertop material. Verify the clip and adhesive system with your fabricator before the install date.
Who Specifies This Sink
Cabinet shops and kitchen designers who regularly build or specify undermount applications in quartz, granite, or solid surface will find the QU-820 straightforward to fit and source. The flat mounting rim, 9-inch depth, and neutral Concrete color make it a low-risk spec for renovation projects where the countertop is the centerpiece and the sink should support it rather than compete with it. Homeowners doing a full countertop replacement — where undermounting is already part of the plan — gain a sink with material durability that holds up well through years of daily use without the maintenance concerns of stainless or the fragility risk of vitreous china.
FAQ
Does this sink install seamlessly in laminate countertops?
No. The QU-820 is a standard undermount sink, not a seamless series model. Seamless laminate integration is documented for Karran's Q Series. The QU-820 is designed for undermounting in quartz, granite, and solid surface countertops.
Where does the faucet mount on this sink?
The QU-820 has no faucet deck. The faucet, soap dispenser, and any accessories are drilled through the countertop behind the bowl, with placement determined during the countertop fabrication.
Are clips or a template included?
Neither a template nor mounting clips ships with this sink. Your countertop fabricator will specify the clips and adhesive method suited to the countertop material being used.
What is the minimum cabinet width needed for this sink?
The QU-820's overall dimensions are 24-3/8 by 19-1/8 inches. Confirm the minimum cabinet size requirement with your fabricator against the actual sink before finalizing the cabinet order.
Is a drain or bottom grid included?
Neither a drain assembly nor a bottom grid is included with a bare-sink purchase. Matching grids and strainers for Karran bowls are sold separately and are model-specific — confirm fit before ordering.
A Sink That Works Behind the Countertop, Not Against It
The QU-820 in Concrete is built to stay out of the way of a well-chosen countertop while handling the demands of a working kitchen — a single, deep basin in a durable quartz composite that fits the undermount spec without complication.
