An Undermount Kitchen Sink Built for Full-Scale Cooking Workflows
The Karran QA-740 is an extra-large single-bowl quartz composite undermount sink designed for the primary kitchen wash station. Its uninterrupted 34 by 21-1/4 inch footprint and 9-inch depth give working cooks and serious kitchen users a basin that handles full sheet pans, large stockpots, and extended prep sessions without division or compromise.
Key Features
• Extra-large single bowl provides an unobstructed basin that accommodates oversized cookware and sheet pans flat on the bottom.
• Quartz composite construction (80% natural quartz, 20% acrylic resin) delivers a highly scratch-, stain-, chip-, and heat-resistant work surface.
• Undermount installation leaves the countertop edge fully exposed for a clean, wipe-down surface from counter to bowl.
• White finish coordinates with a broad range of cabinet and countertop materials, including stone, quartz, and solid surface.
• No faucet deck means the faucet mounts through the countertop, keeping the basin perimeter clear and uncluttered.
Where This Sink Earns Its Place
A single bowl this size is the right call when the priority is workspace over separation. Washing a half-sheet pan, soaking a large roasting pan, or bathing a Dutch oven all happen without tilting or angling to clear a divider. That uninterrupted interior also means a bottom grid sits flat across the full floor, protecting the quartz surface evenly during every use.
Because the faucet mounts through the countertop rather than a sink deck, there is no ledge interrupting the basin perimeter. That design choice gives the installer full freedom in faucet placement — centered, offset, or paired with a side-mount soap dispenser — based on the countertop layout rather than the sink's footprint.
Quartz Composite That Holds Up to Daily Demand
The bowl's quartz composite material is rated highly resistant to scratching, staining, chipping, and heat — the four failure modes that shorten the life of most kitchen sinks. Because the color runs through the full material rather than sitting as a surface coating, the White finish holds up through decades of daily use without dulling or wearing thin at high-contact points. The non-porous surface resists the buildup that requires more aggressive cleaning over time.
Undermounting this sink in stone, quartz, or solid surface countertops is a standard process using clips or adhesive appropriate to the countertop material. The flat mounting rim sits flush beneath the counter with a small positive or negative reveal agreed on during fabrication. The faucet and any accessories drill through the countertop behind the bowl.
Right for Kitchens That Do Real Work
This sink fits cabinet shops specifying kitchen packages for clients who cook at volume — a household that runs the sink hard daily, a kitchen renovation where the designer needs a white sink that reads clean against dark stone, or a contractor replacing an older double-bowl configuration with an unobstructed single. The 34-inch overall width targets a 36-inch sink base cabinet as the standard install, with the countertop overhang accounting for the difference.
Homeowners who have lived with a divided bowl and found it limiting will recognize the difference immediately. The full floor of the basin is the workspace, and nothing interrupts it.
Frequently Asked Questions
Does this sink install seamlessly into laminate or solid surface countertops?
No. The QA-740 is a QU-style quartz undermount sink, not a Q Series seamless sink. Seamless integration in laminate and solid surface is specific to Karran's Q Series. The QA-740 installs as a standard undermount in stone, quartz, and solid surface countertops using the appropriate clips or adhesive for the material.
Where does the faucet mount on this sink?
There is no faucet deck on this sink. The faucet, soap dispenser, and any accessories mount through holes drilled in the countertop. This gives the installer flexibility on placement and leaves the basin perimeter uninterrupted.
Are a drain, grid, or mounting clips included?
This listing is for the sink only. A basket strainer drain, bottom grid, and mounting clips are sold separately. Confirm the drain opening size and countertop material with your fabricator before ordering accessories.
What is the minimum cabinet size for this sink?
The sink's 34-inch overall width targets a 36-inch sink base cabinet as the standard fit. Verify the exact minimum cabinet size with Karran's specification sheet for the QA-740 before ordering if your cabinet dimensions are tight.
Is this sink suitable for outdoor kitchens?
This sink is designed for indoor kitchen applications. Outdoor environments introduce UV exposure, temperature swings, and moisture conditions beyond the scope of this product's design.
A Sink Sized for the Kitchen That Works as Hard as You Do
The QA-740 delivers the unobstructed basin, durable quartz composite build, and clean undermount profile that belong in a kitchen where cooking is more than an occasional activity — a sink that keeps pace with the work without asking you to work around it.
