Product Details
The Karran QAR-740 Black Quartz Undermount Kitchen Sink Delivers Professional Performance for Demanding Kitchens
The Karran QAR-740 in Black represents the pinnacle of modern kitchen functionality, combining 80% natural quartz crystals with advanced acrylic resin technology to create a 34-inch undermount farmhouse sink that withstands the rigors of busy kitchens. Designed specifically for homeowners and professionals who refuse to compromise on performance, this black quartz composite sink delivers unmatched durability while maintaining the aesthetic appeal of natural stone at a fraction of the cost.
Built for retrofit installation into standard 36-inch sink base cabinets, the QAR-740 Black eliminates the need for expensive custom cabinetry while providing the spacious 31" x 16¾" x 9" bowl dimensions that accommodate oversized cookware and commercial kitchen tasks. The rich black finish naturally conceals water spots and mineral deposits that plague lighter-colored sinks, making it the practical choice for kitchens where appearance and performance must coexist seamlessly.
How the Karran QAR-740 Black Outperforms Traditional Kitchen Sinks
• 535°F Heat Resistance – Place hot pots and pans directly from stovetop to sink without fear of damage, cracking, or discoloration to the black surface
• 80% Natural Quartz Construction – Creates a Mohs hardness rating of 7, making it harder than granite and steel knives while resisting chips and scratches from heavy cookware
• Non-Porous Antimicrobial Surface – Prevents bacteria growth up to 98% while eliminating odor retention and food particle penetration that commonly affects natural stone sinks
• Superior Sound Dampening – Quartz material absorbs vibration and reduces dishwashing noise by up to 70% compared to stainless steel alternatives
• Water Spot Concealment – Black surface naturally hides mineral deposits, soap film, and hard water stains that show prominently on white or stainless steel sinks
• Retrofit Farmhouse Design – 6½-inch apron depth allows installation in existing 36-inch standard sink base cabinets without expensive custom modifications
• Rear Drain Placement – Maximizes usable cabinet space below while providing full access for garbage disposal installation and plumbing connections
• Commercial-Grade Durability – Withstands rapid temperature changes from hot and cold water without thermal shock damage or surface cracking
• Stain and Scratch Resistance – Dense quartz composite construction resists impact damage while maintaining color consistency for decades without fading
Precision Engineering Details Specification Karran QAR-740 Black Industry Standard Overall Dimensions 34" L x 21¼" W x 9" D 33" L x 22" W x 8" D Bowl Interior 31" L x 16¾" W x 9" D 30" L x 16" W x 8" D Material Composition 80% Natural Quartz 70% Composite Average Heat Resistance 535°F Maximum 450°F Typical Weight 44 lbs 38 lbs Average Cabinet Requirement 36" Standard Base 39" Custom Base Drain Opening 3½" Standard 3½" Standard Apron Depth 6½" Retrofit 9¼" Full Farmhouse Daily Performance in Busy Kitchens
The QAR-740 Black delivers consistent performance day after day, handling everything from morning coffee preparation to evening dinner cleanup with remarkable resilience. The 9-inch deep bowl accommodates oversized roasting pans, stockpots, and commercial baking sheets that simply won't fit in standard 8-inch depth sinks. Professional chefs and serious home cooks appreciate how the generous 31-inch length provides ample workspace for food preparation tasks while the rear drain placement keeps the working area clear.
The black quartz surface proves its worth during heavy use periods, naturally concealing the water spots and soap residue that constantly plague lighter-colored alternatives. Unlike stainless steel sinks that show every water mark and fingerprint, the QAR-740's black finish maintains its appearance between cleanings, reducing maintenance time while preserving the kitchen's professional appearance. The non-porous surface prevents bacteria accumulation and eliminates the odor retention problems common in natural stone and porous ceramic sinks.
Why Professionals Choose Karran QAR-740 Black
Professional installers and kitchen designers consistently recommend the QAR-740 Black because it combines the visual impact of natural stone with the practical benefits of engineered materials. Unlike natural granite or marble sinks that require sealing and specialized maintenance, this quartz composite maintains its performance characteristics without ongoing treatments or expensive cleaning products. The retrofit design eliminates the $2,000-$5,000 cabinet modification costs associated with traditional farmhouse sinks while providing identical functionality and aesthetic appeal.
25-Year Performance Guarantee Protects Your Investment
Karran backs the QAR-740 Black with a comprehensive 25-year limited warranty covering material performance, color consistency, and structural integrity under normal residential use. This protection begins automatically upon installation without requiring warranty registration paperwork or annual maintenance contracts. The warranty covers heat resistance performance up to 535°F, non-porous surface properties, and manufacturing defects in drain assembly components. Claims processing completes within 30 days of inspection through digital photography, ensuring rapid resolution without extended downtime.
Questions About the QAR-740 Black? We've Got Answers
Q: Will the black finish show water spots and mineral deposits?
A: The black surface naturally conceals water spots and mineral deposits that show prominently on white or stainless steel sinks, requiring less frequent cleaning to maintain appearance.
Q: Can I place hot cookware directly on the sink surface?
A: Yes, the sink withstands temperatures up to 535°F without damage, allowing direct placement of hot pots and pans from stovetop or oven.
Q: Does this sink work with existing 36-inch cabinets?
A: The retrofit design specifically accommodates standard 36-inch sink base cabinets with its 6½-inch apron depth, eliminating expensive custom cabinet requirements.
Q: How does sound compare to stainless steel sinks?
A: Quartz material provides natural sound dampening, reducing dishwashing noise by up to 70% compared to stainless steel alternatives.
Q: What maintenance does the black quartz surface require?
A: Daily cleaning requires only water and mild dish soap, with occasional use of magic eraser sponges for metal marks and vinegar solution for lime deposits.
Q: Is the sink compatible with garbage disposals?
A: Yes, the 3½-inch drain opening accommodates most standard garbage disposal units with rear drain placement providing adequate clearance.
Q: How does quartz compare to natural granite sinks?
A: Quartz offers superior consistency, non-porous properties, and heat resistance while eliminating the sealing requirements and maintenance costs of natural stone.
Q: Can the sink handle commercial kitchen demands?
A: The 80% natural quartz construction and 535°F heat resistance meet commercial performance standards while the 9-inch depth accommodates professional cookware.
Color Options
White | Gray | Concrete
Seaming Adhesive
Seam Adhesive in Bisque | Seam Adhesive in Black | Seam Adhesive in Brown | Seam Adhesive in White | Cartridge Mixing Tips
Undermount Clips
Undermount Installation Clips
Stainless Steel Sink Grid
Protective Sink Grid for QAR-740
Sink Care
Luster Pro Sink Conditioner and Protection
What Customers Say About the QAR-740 Black
"The black quartz sink has been perfect for our busy family kitchen. We cook multiple meals daily and the surface shows absolutely no wear after 8 months of heavy use. The black color hides everything - water spots, soap residue, even pasta sauce stains just rinse away. Installation was straightforward with our existing cabinets and the deep bowl handles our largest stockpots without splashing."
"We upgraded from stainless steel and the difference is remarkable. The sound dampening alone was worth the investment - no more clanging dishes waking the baby during evening cleanup. The heat resistance is incredible - I can place hot Dutch ovens directly from the oven without worry. Professional quality that handles our home restaurant-style cooking perfectly."
"Installation into our existing 36-inch cabinet saved us thousands compared to other farmhouse sinks. The black finish gives our kitchen a sophisticated restaurant appearance while the practical benefits keep maintenance minimal. After two years of daily use, it still looks brand new with just basic cleaning. The 25-year warranty provides peace of mind for this investment."
The QAR-740 Black holds IAPMO certification for residential and commercial applications, ensuring compliance with North American plumbing codes. Karran's reputation for quality manufacturing spans over two decades, with distribution through professional channels ensuring proper support and installation guidance.
Transform Your Kitchen with Professional-Grade Performance
The Karran QAR-740 Black delivers the perfect combination of aesthetic appeal and functional performance for kitchens that demand both beauty and durability. With its 535°F heat resistance, non-porous antimicrobial surface, and natural sound dampening properties, this sink handles the most demanding culinary tasks while maintaining its sophisticated appearance for decades. The comprehensive 25-year warranty protects your investment while the retrofit design ensures compatibility with existing cabinetry, making it the smart choice for kitchen upgrades that prioritize both performance and value.
