Karran Quartz Undermount Sink For Serious Kitchen Workloads
The Karran QA-740 is an extra-large single-bowl quartz composite undermount kitchen sink built for kitchens that demand uninterrupted basin space. At 34 by 21-1/4 by 9 inches, the single bowl gives you room to wash large stockpots, baking sheets, and full cutting boards without a divider getting in the way. The Gray quartz composite finish suits a wide range of countertop palettes and holds up to the daily demands of a working kitchen.
Key Features
• Extra-large single bowl provides an unbroken 34-inch basin, ideal for oversized cookware and bulky prep tasks.
• Quartz composite construction — 80% natural quartz and 20% acrylic resin — delivers high resistance to scratches, stains, chips, and heat.
• Undermount installation places the rim beneath the countertop for a clean, wipe-down counter edge with no lip to collect debris.
• 9-inch bowl depth keeps large pots and sheet pans fully contained and reduces splashing during heavy washing.
• Gray finish coordinates naturally with stone, concrete, and two-tone countertop materials common in contemporary kitchen designs.
Where the Extra Basin Width Earns Its Place
A 34-inch single bowl changes how a kitchen functions. Without a center divider, sheet pans and half-hotel pans lay flat on the bottom grid. A large stockpot sits fully inside the basin rather than teetering across a divider wall. For households that cook in volume — weekend meal prep, catering from home, frequent entertaining — that unobstructed floor space reduces the awkward maneuvering that slows down cleanup. Cabinet shops specifying sink packages for high-use kitchen builds will find the QA-740 scales well to 36-inch sink base cabinets and pairs naturally with through-countertop faucet mounting, since the sink carries no integrated faucet deck.
Quartz Composite: A Material Built for Daily Contact
The QA-740's basin is formed from 80% natural quartz crystals bound in 20% acrylic resin. That ratio produces a surface that resists the everyday sources of kitchen wear: knife slips, cast iron set down without a grid, acidic produce left standing, and hot water from a drained pasta pot. The Gray colorway runs through the full depth of the material, so minor surface wear does not expose a different underlying color. For countertop contexts — granite, engineered quartz, or solid surface — the undermount installation method exposes the finished stone or surface edge and eliminates the crevice that a rim-style sink creates at the deck line.
The Right Fit for High-Demand Kitchens
The QA-740 is at home in primary kitchen installations where the sink sees heavy daily use and basin size matters more than a divided workflow. Residential renovations replacing an older double-bowl sink gain significant usable area by moving to a single-bowl layout at this footprint. Designers working on open-concept kitchens appreciate the Gray tone as a grounding element under lighter stone or quartz decks. Contractors building for clients who cook seriously — or who simply want a sink that won't feel cramped after a year — will find the QA-740 a dependable specification at this size class. Because the faucet mounts through the countertop, there is no deck drilling to plan around, giving the installer flexibility in faucet placement and countertop layout.
Does this sink require a specific countertop material for undermount installation?
Undermount quartz composite sinks like the QA-740 are commonly installed in granite, engineered quartz, and solid surface countertops, where the countertop edge is strong enough to support the rim-free installation. Laminate countertops are not a standard fit for conventional undermount installation. Confirm the countertop material and installation method with your fabricator before cutting.
Where does the faucet mount on this sink?
The QA-740 has no integrated faucet deck, so the faucet mounts through the countertop behind the bowl. This gives you and your fabricator flexibility in faucet positioning and keeps the basin rim clean and uninterrupted.
Is a drain, grid, or template included with the sink?
The QA-740 does not include a template, mounting clips, drain assembly, or bottom grid in the base configuration. These components are sourced separately. Confirm your drain size requirements with your plumber, and check Karran's accessory line for model-compatible grids and basket strainers.
Can the Gray quartz composite surface be repaired if it chips?
Quartz composite is resistant to chips under normal use, but it is not chip-proof. Unlike solid surface materials, quartz composite cannot be sanded and refinished. Touch-up options depend on severity; contact Karran for guidance on repairs specific to this material.
What minimum cabinet size does this sink require?
The overall sink dimensions are 34 by 21-1/4 inches. A 36-inch sink base cabinet is the standard pairing for a sink at this width. Verify the actual cabinet opening and countertop support with your fabricator before installation.
One Basin, Built to Handle the Full Load
The QA-740 delivers the capacity and durability that high-use kitchen installations demand, in a Gray quartz composite finish that works across a broad range of countertop and cabinet combinations. For cooks, renovators, and designers who want maximum unobstructed basin space with a surface built to last, this is a sink specification that holds up over time.
