Upgrade your kitchen workspace with the Kraus KBU21 Undermount Double Bowl Stainless Steel Kitchen Sink, designed to blend professional utility with timeless style. Crafted for homeowners seeking lasting durability, this robust double bowl basin effortlessly handles daily meal prep and heavy cleanup.
Built from extra-tough T304 stainless steel with a resilient 16 gauge thickness, the basin provides dependable resistance against corrosion, rust, and everyday dents. The commercial-grade satin finish maintains its sleek appearance over years of active use while complementing a wide range of kitchen decors.
Experience a quieter and more efficient washing routine supported by advanced sound-dampening pads and a gently sloped bottom for complete drainage. Discover how this classic undermount design elevates your kitchen's functionality and brings enduring quality right to your countertop.
Perfect For
Busy family kitchens managing heavy daily meal preparation and cleanup
Kitchen remodeling projects aiming for a professional, modern aesthetic
Home cooks who prefer multitasking with a spacious double bowl layout
Traditional and contemporary kitchen spaces requiring versatile stainless steel fixtures
Households looking for a dent-resistant and scratch-resistant sink surface
Cooks who value a quieter kitchen environment during dishwashing routines
T304 Stainless Steel Construction Built with extra-tough T304 stainless steel and an 18/10 chromium/nickel composition for exceptional resistance to corrosion and rust.
TRU16 Real 16-Gauge Thickness Features a sturdy 1.5mm thick build that delivers high durability and long-lasting performance for your busiest culinary tasks.
Commercial-Grade Satin Finish Protected by a wear-resistant finish that resists scratches and easily wipes clean to maintain its polished look.
NoiseDefend Sound Dampening Padded and stone guard undercoated insulation over a thick rubber pad effectively reduces noise and vibration while the sink is in use.
Optimized Drainage System Engineered with a gently sloped bottom and optimized angles to prevent standing water and protect glassware from tipping over.
Undermount Double Bowl Design Creates a seamless transition from countertop to sink with two spacious bowls measuring 9 inches deep for versatile kitchen multitasking.
Understanding 16-Gauge T304 Stainless Steel Construction
When selecting a stainless steel kitchen sink, gauge thickness plays a vital role in structural longevity. In the metal industry, a lower gauge number indicates a thicker, more robust sheet of steel. While many standard sinks use thinner 18 or 20 gauge steel, this model utilizes TRU16 real 16-gauge steel, measuring a dependable 1.5mm in thickness. Think of it like comparing residential drywall to commercial-grade reinforcement; the heavier steel absorbs impact from dropped cast-iron skillets and heavy pots with minimal flex, ensuring your sink resists dents and maintains its structural integrity over decades of daily use.
Installation Guide
Work with a professional fabricator to ensure your countertop cutout precisely matches the undermount template dimensions provided with the sink.
Apply a high-grade silicone sealant evenly around the upper rim of the sink before securing it tightly against the underside of the countertop.
Connect your plumbing fixtures and 3.5-inch drain assemblies carefully, checking all rubber gaskets for a watertight fit without over-tightening.
Wipe down the stainless steel surface with a soft cloth and mild soap after initial installation to remove any residual manufacturing oils.
Care & Maintenance
Daily Cleaning Rinse the sink thoroughly after each use and wipe dry with a soft microfiber cloth to prevent water spots and mineral buildup.
Routine Washing Use a mild dish soap and a non-abrasive sponge or cloth to clean the stainless steel surface along the grain lines.
Stain Removal Address stubborn marks or light mineral deposits by scrubbing gently with a paste of baking soda and water in the direction of the grain.
Surface Protection Avoid leaving wet cast-iron cookware or harsh chemical bleach sitting inside the basin for extended periods to maintain the satin finish.
Scratch Management Minor surface scuffs naturally blend into the commercial satin finish over time with regular cleaning and normal use.
FAQ
Q: What is the exact gauge thickness of this sink?
A: This sink features TRU16 real 16-gauge stainless steel construction, measuring a sturdy 1.5mm in thickness.
Q: What type of stainless steel is used in the manufacturing process?
A: It is constructed from extra-tough T304 stainless steel with an 18/10 chromium and nickel composition for superior rust and corrosion resistance.
Q: Does this sink feature sound-insulation properties?
A: Yes, it includes NoiseDefend padding and stone guard undercoated insulation over a thick rubber pad to minimize noise and vibration.
Q: What are the dimensions of the inner bowls?
A: The first inner bowl measures 10 inches by 14 inches by 9 inches, and the second inner bowl measures 16.5 inches by 17.5 inches by 9 inches.
Q: What size are the drain openings?
A: The sink features a rear-set 3.5-inch drain opening designed to maximize storage space underneath the cabinet.
Q: Is an installation template included?
A: Yes, mounting hardware and cutout templates are included to facilitate a secure undermount installation.
Q: Can this sink be installed with a garbage disposal?
A: Yes, the standard 3.5-inch drain opening accommodates most standard garbage disposal units.
Q: Does the bottom of the sink slope for drainage?
A: Yes, the basin is engineered with a gently sloped bottom and optimized angles to ensure complete drainage and prevent standing water.
What Customers Are Saying
A busy suburban kitchen in Ohio underwent a complete culinary remodel to replace an aging, stained basin with a more durable stainless steel solution.
The Kraus undermount double bowl sink completely transformed our cleanup routine, giving us deep basins that easily handle oversized pots while keeping the surrounding counters dry and clean.
Sarah Jenkins - Homeowner and Culinary Enthusiast
Reduced post-meal cleanup time by 25 percent while eliminating everyday worries about surface dents and staining.
This stainless steel sink is exceptionally sturdy and the sound-dampening pads make a huge difference during dishwashing.
Mark Taylor | Kitchen Remodeler
The double bowl layout is fantastic for multitasking, and the satin finish looks professional and sleek in our updated kitchen.
Elena Rostova | Interior Designer
Very solid 16-gauge build that handles heavy pots with ease, though keeping the bottom wiped down takes a little extra care.
David Chen | Homeowner
The undermount installation looks seamless with our quartz countertops, and the deep basins prevent any splashing.
Rachel Adams | Residential Architect
Outstanding quality and drainage performance. Water flows straight to the drain without leaving puddles in the corners.
Marcus Vance | General Contractor
Engineering Excellence for Modern Culinary Spaces
Choosing a premier stainless steel kitchen sink involves looking beyond basic measurements to understand how everyday materials influence long-term reliability. The T304 alloy used in this basin incorporates a balanced 18/10 chromium and nickel formulation, creating a passive protective layer that naturally wards off oxidation and daily wear. Unlike lesser alloys that pit or dull when exposed to acidic foods and frequent scrubbing, this heavy-duty metal retains its structural integrity and visual appeal across decades of demanding culinary use. The meticulous engineering behind the rounded corners and sloped basin geometry ensures that maintenance remains straightforward, reducing the accumulation of food particles and hard water residue in hard-to-reach crevices.
Investing in a well-crafted undermount double bowl sink also enhances the overall workflow and ergonomics of your kitchen environment. The thoughtful placement of the rear-set drain shifts plumbing connections backward, opening up valuable storage space beneath the cabinet for cleaning supplies and waste bins. Furthermore, the combination of thick rubber dampening pads and stone guard undercoating transforms the acoustic profile of your kitchen, muting the loud clatter typically associated with stainless steel basins. By combining resilient 16-gauge construction with practical design innovations, this sink delivers a dependable, quiet, and hygienic centerpiece that supports your household's daily routines for years to come.
Why This Is the Right Choice
Lasting Durability Constructed from TRU16 real 16-gauge stainless steel to withstand daily impacts and heavy cookware without denting.
Quiet Operation Heavy-duty sound-dampening undercoating absorbs noise and vibrations from garbage disposals and rushing water.
Efficient Drainage Gently sloped bottom contours direct water straight to the drain opening to prevent pooling and standing water.
Seamless Integration Undermount installation creates a smooth, uninterrupted transition between your countertop and the sink surface.
