A Wide, Deep Quartz Basin for Serious Kitchen Work
The Karran QA-740 is an extra-large single-bowl undermount kitchen sink in quartz composite, offered here in Concrete. Its broad, uninterrupted basin gives cooks and cabinet installers alike a workhorse station that handles full sheet pans, large stockpots, and the demands of a busy kitchen without compromise.
Key Features
• Extra-large single bowl provides an unbroken basin suited to oversize cookware and demanding prep workflows.
• Quartz composite construction (80% natural quartz, 20% acrylic resin) delivers a surface that resists scratches, stains, chips, and heat in daily use.
• Undermount installation positions the sink below the countertop for a clean counter edge and easy wipe-down.
• Concrete color offers a neutral, on-trend tone that pairs naturally with grey-spectrum countertops, white cabinetry, and industrial-style finishes.
• 9-inch bowl depth keeps deep cookware and colanders fully contained without splashing over the rim.
Where the Single-Bowl Layout Earns Its Place
A divided bowl splits the workspace. The QA-740 eliminates that constraint entirely, giving the full 34-inch length and 21-1/4-inch width to a single open basin. That matters most when you are washing a roasting pan that would span two bowls, soaking a full rack of cabinet frames, or running a busy kitchen where one cook needs every inch of the basin at once. The 9-inch depth keeps large pots submerged and reduces splatter when rinsing tall vessels. For a primary kitchen sink in a home with serious cooking habits, or a secondary prep station in a commercial-adjacent shop environment, the open layout consistently outperforms divided configurations.
Quartz Composite That Holds Up to Daily Abuse
The bowl is formed from a blend of 80% natural quartz and 20% acrylic resin, a ratio that gives quartz composite its reputation for toughness. The material resists the scratches that bare stainless accumulates, shrugs off the staining that plagues lighter porcelain, and handles the thermal stress of hot pans and boiling water better than many synthetic surfaces. The matte Concrete finish also hides water spots and minor marks between cleanings, a practical benefit that glossy whites rarely match. The dense, non-porous surface cleans with standard household cleaners and does not require sealing.
Who Specifies This Sink and Why
Cabinet shops installing complete kitchen packages reach for an extra-large quartz bowl when the client wants a sink that performs as a statement piece without demanding ongoing care. Designers specifying for open-plan kitchens where the sink is visible from the living area appreciate the Concrete color's versatility across warm and cool palettes. Homeowners renovating a kitchen with a 36-inch or larger sink base will find the QA-740's footprint lands cleanly in that opening. The undermount method suits quartz, granite, and solid surface countertops; installation should be completed by a professional familiar with countertop-specific clip and adhesive requirements for the chosen counter material. Note that a drain assembly, mounting clips, and template are not included with this sink and are sold separately.
Frequently Asked Questions
Is this sink compatible with laminate countertops?
Undermount installation in laminate is not documented for the QA-740. The QA-740 is a standard undermount model suited to quartz, granite, and solid surface countertops. Karran's Q Series is the line engineered for seamless undermount installation in laminate and solid surface countertops.
What size sink base cabinet does this sink require?
The overall dimensions of the QA-740 are 34 inches by 21-1/4 inches. Confirm minimum cabinet size against your specific cabinet run before ordering; a 36-inch sink base is the common pairing for a sink of this width, but verify the actual cabinet opening with the sink in hand before cutting.
Does the sink ship with a drain, mounting clips, or template?
No. The QA-740 is a bare sink. A drain assembly, mounting hardware, and template are sold separately. Purchase those components before beginning installation.
How does the Concrete finish hold up against staining from coffee, wine, or food dye?
The quartz composite surface is highly stain-resistant in normal kitchen use. The Concrete color's mid-tone, matte character also minimizes the visibility of residue between cleanings. Rinse promptly after contact with heavily pigmented liquids for best long-term results.
Can I pair this sink with any faucet?
The QA-740 has no faucet deck, so the faucet mounts through the countertop rather than through the sink. Choose a faucet whose mounting holes match the drillings planned for your counter material, and confirm reach is sufficient to clear the 34-inch bowl width.
A Confident Choice for a High-Use Kitchen Station
The QA-740 in Concrete brings together a proven quartz composite material, a generous single-basin workspace, and a finish that ages gracefully through years of real kitchen use — a combination that serves equally well in a custom residential install and a professional cabinet shop's showroom display.
