A 34-Inch Single Bowl Sink Built for the Workhorse Kitchen
The Karran QA-740 is an extra-large single bowl quartz composite undermount sink designed for kitchens that demand maximum uninterrupted basin space. Finished in Brown, this 34 by 21-1/4 by 9 inch sink mounts beneath quartz, granite, and solid surface countertops, delivering a clean wipe-through edge with none of the divider that gets in the way when you're washing a full roasting pan or a sheet of cabinet doors.
Key Features
• 80% quartz / 20% acrylic resin construction makes the bowl highly resistant to scratches, stains, chips, and heat from everyday kitchen use.
• Extra-large 34 by 21-1/4 inch footprint provides an unbroken basin that handles oversized cookware, sheet pans, and large cabinet parts without a center divider in the way.
• 9-inch bowl depth keeps water contained and gives tall pots and deep trays full clearance below the rim.
• Flat undermount rim with no faucet deck positions faucet and accessories through the countertop, keeping the basin perimeter clean and uninterrupted.
• Brown quartz color integrates with warm-toned countertop palettes and natural wood cabinetry without requiring a finish match to hardware.
• Compatible with quartz, granite, and solid surface countertops for a flush, wipe-clean transition from counter to bowl.
Where This Sink Earns Its Place
A single bowl this size solves a specific problem: the kitchen that handles volume. Cabinet shops and contractors who set up show kitchens or spec sinks for working households know that a divided bowl loses usable depth the moment something wide goes in. The QA-740 removes that constraint entirely. Washing large cutting boards, submerging deep stockpots, or cleaning a full sheet pan flat on the basin floor — none of that requires angling around a divider. For homeowners renovating a kitchen that already handles a lot of prep and cleanup, this bowl configuration is the straightforward answer when the priority is capacity over separation.
Quartz Composite Construction and the Brown Finish
Quartz composite is not a stone veneer or a coating — it is a structural blend of 80% natural quartz crystals and 20% acrylic resin, cast through the full depth of the bowl. That composition makes the surface resistant to the everyday abuse a main kitchen sink takes: cutting-board scrapes, cast iron contact, boiling water splash, and the staining from coffee, wine, and cooking residue. The Brown colorway runs through the material, so a scratch or chip does not reveal a different color underneath. Brown pairs naturally with walnut, hickory, and warm-toned wood cabinets, and holds its own alongside bronze and brushed gold hardware without requiring an exact match. The finish is a matte satin that does not show water spots the way a polished surface does.
The Right Fit for This Installation
This sink is for the buyer who has already decided on undermounting and is working with a quartz, granite, or solid surface countertop. The flat rim is engineered for that installation path: the countertop edge finishes over the rim, the faucet mounts through the stone or solid surface behind the bowl, and the result is a counter that wipes directly into the basin with no lip to catch debris. Note that this is a standard undermount installation, not a seamless laminate integration — that method belongs to Karran's Q Series. Fabricators and installers working in stone or solid surface countertops will find the QA-740's flat-rim geometry straightforward to mount using the fastener method appropriate for the countertop material. A drain assembly and mounting clips are not included and should be sourced separately before the install date.
What countertop materials work with the QA-740?
This sink is documented for undermount installation in quartz, granite, and solid surface countertops. It is not a seamless laminate sink — if you are working in laminate or a postform top, the Karran Q Series is the correct line.
Does the faucet mount through the sink or through the countertop?
Through the countertop. The QA-740 has no faucet deck, so the faucet, soap dispenser, and any other accessories drill through the countertop surface behind the bowl.
Is a drain or mounting hardware included?
No. The drain assembly and mounting clips are sold separately. Order them before the countertop fabrication appointment so the installer has everything on hand.
What is the minimum cabinet size for this sink?
Based on the sink's 34 inch overall length, a 36 inch sink base cabinet is the expected minimum, consistent with Karran's published sizing guidance for sinks in this footprint class. Confirm the actual cabinet opening against the sink's overall dimensions before cutting.
Will the Brown quartz fade or change color over time?
The brown color runs through the full depth of the quartz composite material rather than sitting as a surface coating, so it does not fade, peel, or wear through with normal use.
Maximum Basin, Minimal Compromise
The QA-740 delivers the full 34-inch interior of an extra-large single bowl in a durable quartz composite that handles the demands of a working kitchen — sized for the jobs that make a divided bowl feel small, finished in a Brown that fits naturally into warm-toned kitchen builds.
