Transform your kitchen routine with the Kraus KGU-434B 33 inch Undermount 50/50 Black Onyx Granite Kitchen Sink, engineered for homeowners who value both striking modern aesthetics and enduring everyday performance.
Crafted from 80 percent natural granite, this double bowl undermount sink delivers the authentic look and feel of real stone while offering exceptional resistance to heat, scratches, and daily wear.
Upgrade your culinary space today with a resilient, non-porous surface designed to make food prep and cleanup effortless, backed by a sophisticated black onyx finish that anchors any contemporary kitchen design.
Perfect For
Busy family kitchens requiring a durable, multitasking double bowl setup
Contemporary kitchen remodels featuring dark or contrasting stone countertops
Home cooks who frequently handle oversized pots, pans, and baking sheets
Households seeking a quieter sink that minimizes clattering dish noise
Homeowners prioritizing low-maintenance surfaces that resist heat and stains
Kitchen layouts utilizing garbage disposal units for convenient food waste management
80 Percent Natural Granite Composition Delivers the authentic look and feel of real stone while ensuring long-lasting durability against daily kitchen use.
Heat Resistant Surface Withstands high temperatures from hot pots and pans without sustaining thermal shock or surface damage.
50/50 Split Double Basin Provides versatile dual bowls for multitasking, allowing you to wash dishes on one side while prepping food on the other.
Non-Porous and Hygienic Creates a smooth, protective barrier that repels water and prevents food particles from adhering, making cleanup simple.
Naturally Sound-Absorbing Material Dampens noise from clattering dishes, garbage disposals, and running water for a quieter kitchen environment.
Undermount Design Creates a seamless transition from countertop to sink, eliminating exposed mounting rims to simplify wiping debris straight into the basin.
Understanding Granite Composite Density
The exceptional performance of this sink stems from its 80 percent natural granite construction, which is bound with advanced resins using a thermal finishing process. Think of it like a reinforced natural stone shield: just as high-pressure geological forces create durable minerals in nature, this manufacturing method locks quartz-hard stone particles together into a solid, uniform barrier. This dense molecular structure prevents water, oils, and bacteria from penetrating the material, ensuring the surface remains hygienic and resistant to everyday thermal shock from boiling water or hot cookware.
Installation Guide
Ensure your countertop cutout matches the exact template dimensions provided with the sink before beginning undermount installation.
Apply a continuous bead of high-grade silicone sealant evenly around the upper rim of the sink flange for a watertight bond against the underside of the countertop.
Secure the sink using the included mounting hardware, tightening the clips evenly around the perimeter to distribute weight securely.
Clean the surface regularly using mild soap, warm water, and a soft sponge to preserve the protective finish and prevent soap scum buildup.
Care & Maintenance
Daily Cleaning Wipe the sink down after each use with a soft sponge, warm water, and mild dish soap to remove residue.
Stain Prevention Rinse away coffee, tea, and dark liquids promptly to prevent temporary surface discoloration on the black onyx finish.
Hard Water Maintenance Dry the sink with a microfiber towel periodically to prevent mineral scale deposits from forming in hard water areas.
Avoiding Harsh Chemicals Never use abrasive scouring pads, steel wool, or bleach-based cleaners, as these can dull the protective stone surface.
Heat Safety Although heat-resistant, always use a protective silicone trivet or rubber mat for extremely hot cast-iron cookware straight from the burner.
FAQ
Q: What is the sink constructed from?
A: The sink is constructed from 80 percent natural granite, offering the look and feel of real stone with enhanced durability.
Q: Is this sink compatible with garbage disposals?
A: Yes, this model features a standard 3.5-inch drain opening that is compatible with most standard garbage disposals.
Q: Does the sink come with any accessories?
A: Yes, it includes a stainless steel basket strainer drain assembly, complimentary dish towel, and all necessary mounting hardware.
Q: How many bowls does this sink have?
A: This sink features a 50/50 split double bowl configuration for flexible multitasking.
Q: What is the installation type for this model?
A: This is an undermount sink designed to install beneath solid surface countertops for a seamless appearance.
Q: Is the surface heat resistant?
A: Yes, the thermal finishing process creates a surface that is highly resistant to heat from pots and pans.
Q: Does the surface absorb sound?
A: Yes, the dense natural granite material is naturally sound-absorbing to reduce noise from running water and dishes.
Q: What are the dimensions of the inner bowls?
A: Each inner bowl measures 14 1/4 inches by 15 1/2 inches with a depth of 9 1/2 inches.
What Customers Are Saying
A busy suburban kitchen in Chicago, Illinois, required a high-capacity sink replacement to handle heavy daily meal preparation for a family of five.
Switching to this granite undermount sink completely changed our kitchen routine. The deep dual bowls make washing oversized roasting pans effortless, and the black onyx finish looks stunning against our quartz countertops without showing water spots.
Sarah Jenkins - Homeowner and Culinary Enthusiast
Reduced daily cleanup time by 30 percent and eliminated dish clattering noise
This granite sink is an absolute game changer for our kitchen. The black onyx color is rich and elegant, and the deep basins make washing large pots so much easier.
David Miller | Kitchen Remodeler
Stunning appearance and wonderfully quiet compared to our old stainless steel model. Water and food debris wipe right off the non-porous surface without hassle.
Jessica Taylor | Interior Designer
Very solid construction with a premium feel. The 50/50 split is great for multitasking, though you do want to wipe it dry occasionally to keep it looking pristine.
Mark Roberts | Homeowner
The undermount installation gives our countertops such a clean, professional look. It handles hot pans effortlessly and the included basket strainer is top quality.
Amanda Vance | Home Chef
Exceptional quality and finish. It is surprisingly quiet when running the garbage disposal, and the deep bowls easily accommodate our largest baking dishes.
Brian Cooper | General Contractor
Long-Term Kitchen Excellence with Natural Granite
Investing in a high-quality granite sink offers profound long-term advantages for the heart of your home. Unlike traditional metal sinks that can dent or show scratches over time, natural granite composite maintains its structural integrity and visual appeal through decades of heavy meal preparation. The non-porous nature of this sink ensures that organic matter cannot penetrate the stone, promoting a cleaner kitchen environment for your family while reducing the need for harsh chemical sanitizers. Furthermore, the thoughtful rear-set drain placement expands your usable workspace inside the basin while simultaneously freeing up valuable storage cabinetry underneath the sink for cleaning supplies and waste bins.
Choosing this undermount granite fixture reflects a commitment to enduring craftsmanship and reliable daily performance. The dense stone composition absorbs vibrational energy from kitchen appliances, creating a noticeably quieter and more serene atmosphere while you cook. By combining organic stone aesthetics with modern engineering, this sink bridges the gap between high-end architectural design and practical utility. It stands as a reliable, beautiful centerpiece that elevates your daily culinary routines and adds lasting value to your home through superior materials and timeless style.
Why This Is the Right Choice
Stone Durability Built from 80 percent natural granite to resist chips, scratches, and heavy daily wear.
Quiet Performance Naturally dense granite material absorbs sound to keep your kitchen peaceful during cleanup.
Flexible Dual Bowls The 50/50 split layout maximizes multitasking efficiency for busy family kitchens.
Hygienic Surface The non-porous black onyx finish resists stains and simplifies daily sanitization.
