Kraus KBU25 Stainless Steel 32-3/8" Undermount 40/60 Double Bowl 16 Gauge Stainless Steel Kitchen Sink

Item #: bci1870458

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Stainless Steel
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Technical Specs

Specification Sheet
ANSI Approved Yes
Approved for Commercial Use Yes
Basin Depth (Left) 7.313
Basin Depth (Right) 9
Basin Length (Left) 11.375
Basin Length (Right) 17.75
Basin Rack Included Yes
Basin Split 40/60
Basin Width (Left) 15.375
Basin Width (Right) 18.5
Basket Strainer Included Yes
CSA Approved Yes
Colander Included No
Cutting Board Included No
Drain Connection 3.5
Drain Placement Rear
Farmhouse No
Faucet Holes 0
Faucet Included No
Gauge 16
Height 9
Installation Type Undermount
Length 32.375
Manufacturer Warranty Limited Lifetime
Material Stainless Steel
Minimum Cabinet Size 33
Mounting Hardware Included Yes
Number Of Basins 2
Overflow No
Product Weight 17.5
Sink Shape Specialty
Sound Dampening Yes
Stainless Steel Grade 304
Theme Modern
UPC Approved Yes
Width 20.5

Save $130 when you purchase this kitchen combo.

Product Features:

  • Fully covered under Kraus' limited lifetime warranty
  • Constructed of 16 gauge premium grade T-304 stainless steel - guaranteed to never rust or corrode
  • Commercial-grade satin finish - highly scratch and stain resistant
  • Padded, Stone-Guard undercoat applied over rubber pads to reduce sink noise while in use
  • Double bowl (40/60 split) 32-3/8" sink with traditional rounded corners
  • Extra deep (9" depth) design is perfect for the semi-professional kitchen
  • Undermount installation; fits 36+" cabinets
  • Standard 3-1/2" drain opening compatible with most garbage disposal units (included InSinkErator)

Product Specifications:

  • Height: 9" ( measured from the bottom of sink to the top of the rim)
  • Overall Width: 20-1/2" (measured from the back outer rim to the front outer rim)
  • Overall Length: 32-3/8" (measured from the left outer rim to the right outer)
  • Basin Width (Left): 15-3/8" (measured from the back inner rim to the front inner rim)
  • Basin Width (Right): 18-1/2" (measured from the back inner rim to the front inner rim)
  • Basin Length (Left): 11-3/8" (measured from the left inner rim to the right inner rim)
  • Basin Length (Right): 17-3/4" (measured from the left inner rim to the right inner rim)
  • Basin Depth (Left): 7-5/16" (measured from the center of basin to the rim)
  • Basin Depth (Right): 9" (measured from the center of basin to the rim)
  • Installation Type: Undermount
  • Drain Outlet Connection: 3-1/2"
  • Minimum Base Cabinet Width: 36"

What's Included:

  • Kraus 16 gauge Stainless Steel sink
  • Stainless steel bottom dish grid (basin rack)
  • Stainless steel basket strainer (sink drain assembly)
  • Mounting and installation brackets
  • Sink cutout template (for countertop cut dimensions)
  • Dish towel with Kraus logo
  • Specification Sheet / Installation Guide

Advantages of Stainless Steel over Enameled Cast Iron or Fireclay:

  • Very durable; will never chip or crack
  • Dishes usually don't break when dropped during dish washing
  • Due to relative weights, stainless steel is generally much easier (and less expensive) to install
  • Nonporous; resists bacteria
  • Neutral color fits into almost any décor - matches stainless steel appliances

Product Technologies / Benefits:

  • Extra Thick, 16 Gauge Stainless Steel: Short of paying thousands of dollars, 16 gauge is as thick as sinks come (22% thicker than 18 gauge; 36% thicker than 20 gauge). Thicker steel means a stronger sink (hence the lifetime warranty) while also offering a richer and more robust appearance to the finish that is easily discernible from the white-washed, cheap look of thinner sinks.
  • Premium Grade T-304 Stainless Steel: There are two primary types of stainless steel in the market: T-409 and the higher quality T-304. The difference lies in chromium and nickel contents; T-409 with 11% and .5% respectively, T-304 with 18% and 10%. When added to steel, these two metals prevent oxidation and rust by neutralizing sodium chloride (salt) – a common element in everyday kitchens. While cheaper sinks use T-409, Kraus sinks boast T-304, further lending to the lifetime warranty.
  • Sound Insulated: Sound insulated steel is commonly only thought of in the automobile industry. There, auto manufacturers use spray-on "Stone Guard" insulation to provide for a quieter ride and protect the steel. Borrowing this technology and adding to it, Kraus sinks use Stone Guard insulation, sprayed over rubber sound dampening pads to create a noticeably lower-tone and overall quieter kitchen sink. It also protects your cabinet from underside condensation drips.
  • Included Dish Grids (Basin Racks) and Basket Strainers (Drains): It's a wonder why dish grids aren't included with all sinks; they serve a valuable role. Not only do they virtually eliminate scratches, they allow the sink to properly drain, preventing sink scum and protecting your cutlery. As with all Kraus sinks, this sink includes the stainless steel sink grids along with the basket strainers you'll need for installation.
  • Heavily Certified: Kraus has gone to great lengths to be able to provide you, the homeowner, the rest-easy satisfaction knowing that your sink is certified and listed by all the major product testing boards in the U.S. and Canada. This means that this sink is deemed safe to use and that it meets all applicable building codes. Certifications and listings include: UPC, cUPC, CSA, IAPMO, ANSI and SCC.

Special Note:

  • This kitchen sink is available as a kitchen combo with a number of faucet choices. Like their sinks, Kraus kitchen faucets have gained tremendous momentum within the kitchen and bath industry and are highly regarded for their quality, durability, and meaningful innovation. If you are considering a purchase of this sink and also need a new faucet, we urge you to consider the kitchen combos; they truly are a deal. Under the header "We Also Recommend These Similiar Products" you will find 5 kitchen combos that include this sink. All kitchen combos that use this sink can be found by typing "KBU25 combos" into the search bar at the top right of this page.

Additional Kraus Links

Our SKU: KBU25

This product is listed under the following manufacturer number(s):

  • Stainless Steel

*Denotes a finish or option that has been discontinued

4 Questions from the Community

  • The Kraus KBU25 can have a disposal mounted on either side of the sink.

    Can the disposal be mounted on either side of the sink?

    A. The Kraus KBU25 can have a disposal mounted on either side of the sink.

  • Any standard size flange and stopper kit should work on the Kraus KBU25. Usually this would be purchased along with the faucet to match up the finishes of the items.

    Is there a recommended flange and stopper for the KBU25?


    Any standard size flange and stopper kit should work on the Kraus KBU25. Usually this would be purchased along with the faucet to match up the finishes of the items.

  • The Kraus KBU25 is not recommended to be cleaned with bleach. It is best to use a stainless steel sink cleaner, or any other cleaning agent that is bleach free and non-abrasive. 

    Can this sink be cleaned with bleach?


    The Kraus KBU25 is not recommended to be cleaned with bleach. It is best to use a stainless steel sink cleaner, or any other cleaning agent that is bleach free and non-abrasive. 

  • Kraus does not make a specific cutting board for the KBU25.

    Is a cutting board available for the smaller bowl?


    Kraus does not make a specific cutting board for the KBU25.

Product Reviews

Rated 5 out of 5 by from 31-1/2" undermount 60/40 double bowl 16 gauge stai I love my sink it is big and deep. I can put my big pans in and clean it with no problem.
Date published: 2014-02-06
Rated 5 out of 5 by from Beautiful, functional sink We are so happy with our new Kraus sink. It met all our needs. Large deep sinks that came with everything you need. We liked the fact we did not have to buy extra items like the drains and protective grids. Our garbage disposal easily fit under it. In addition it is a beautiful sink that cleans up well. We also liked that it was a heavier guage stainless steel than Blanco or Franke at half the price. The sink came packaged as if it were a piece of jewelry in a cloth bag. The customer service at Kraus was friendly and informative. E faucet Direct was also extremely helpful and answered many questions for me. I would definitely recommend this sink.
Date published: 2013-12-08
Rated 5 out of 5 by from 2 sinks We bought the #25 sink and the #11 sink. They were delivered in a timely manner in terrific condition. The granite people and the plumber impressed with the quality of the sinks. The granite people delivered my # 25 sink and their next stop also contained the same sink. We want to also thank the terrific sales staff for their help and advise. 5 stars.
Date published: 2013-11-05
Rated 5 out of 5 by from Exelent product Easy to install but it must be done by a professional. Product as advertised.
Date published: 2013-09-19
Rated 5 out of 5 by from Great Sink I am so happy with this sink. i wanted a basin with the smaller sink on the left/larger on the right. This sink looks beautiful with our new granite counters and the installer had no problems installing it. It was delivered in a few days and arrived in perfect condition, very well packaged. The grates for both sinks are an extra bonus. We have used our sink for 2 months and would recommend it to anyone looking for a 65/35 sink.
Date published: 2012-12-06
Rated 5 out of 5 by from Excellent sink This is a gorgeous sink - we bought it sight unseen and mounted it into a quartz counter. The steel is heavy duty and the brushed look goes great with our appliances and faucet (the Grohe 32 665). We're very happy.
Date published: 2012-11-21
Rated 5 out of 5 by from Kraus 32" Undermount 65/35 Double Basin 16 Gauge This is a fabulous kitchen sink. This sink is a heavy duty stainless sink which undermounts to my granite kitchen counter. It came with stainless steel grates for the bottom of the sink. The quallity of both are better then I expected. The price was reasonable at I would highly recommend this sink and this company. Kraus makes great products.
Date published: 2012-11-20
Rated 5 out of 5 by from Great Experience and Product Awesome 16 gauge sink ... what a value. Mounted up nicely in a 34" space and has exceeded expectation. Service on the site was great especially with the online helper to answer questions. All around great experience. Thank you for the fine product and service.
Date published: 2012-09-13
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Kraus redesigned several plumbing industry standards and focused on modern plumbing style. Offering an extensive selection of faucets and sinks, Kraus aims to provide quality and handmade plumbing fixtures to its customers. For plumbing that balances durability with aesthetics, Kraus keeps its luxurious products at an affordable price.

Kraus Kitchen Sink Collection

No other brand does sleek and strong better than Kraus. The Kraus Kitchen Sink collection offers a vast selection of premium stainless steel sinks for everything from the single chef kitchen to the kitchen built to host large family dinners. Kraus kitchen sinks are made from commercial grade 16 gauge stainless steel to handle the daily wear and tear of a bustling kitchen. Homeowners are guaranteed rust resistant surfaces, reliable performance, and superior durability. In addition to quality craftsmanship, most Kraus kitchen sinks come with bonus accessories including an industrial sized basket strainer, sink grid, and signature Kraus dish towel. Available in an assortment of single bowl and double bowl configurations, the Kraus Kitchen Sink Collection has a fit for every lifestyle.

Other Products In The Kraus Kitchen Sink Collection

View all 363 products in Kraus Kitchen Sink Collection

Warranty Info

All KRAUS products undergo a rigorous quality control process. We offer our customers thoughtfully crafted fixtures & accessories, engineered for enduring performance over years of use. KRAUS Brand Limited Lifetime Warranty If a product fails due to material or craftsmanship error during the warranty period, KRAUS will repair or replace the items at our discretion. We define the warranty period as the length of time that the owner of the product owns the first home where the Kraus product is installed. Warranties are not transferable, between homes or owners and are only applicable to residential use. Commercial use will automatically void the warranty. To make a warranty claim, the original sales receipt must be presented, without exception. Like other home fixtures, Kraus products will require light maintenance to ensure proper function. We provide you with complete knowledge to perform this maintenance and can also recommend resources if you are unable to fulfill this service. Kraus will not be responsible for product failures due to lack of maintenance. Kraus recommends installing all Kraus products with a licensed, professional plumber. We will not be held responsible for any damage or product failure due to improper installation, misuse, or failure to use a licensed professional. Please read your care and maintenance documentation to determine the limits of proper use. By the purchase and use of our products, you agree that Kraus is not liable for incidental, consequential or special damages associated with the return, replacement, installation or use of your product. This includes freight costs, cartridge replacement, labor, travel time, lost profit, home damages and other contingent liabilities and costs (including, without limitation, costs associated with experts, investigations, analyses, attorneys and other professionals and services). The Kraus warranty is a comprehensive and explicit limit of liability, and all items outside of it are not addressable by, or the responsibility of Kraus. Certain states have variances regarding implied warranties and in those situations we remain fully compliant. KRAUS USA Inc. makes no implication that products comply with any or all local building or plumbing codes. It is the consumer’s responsibility to determine local code compliance. This warranty extends to the original purchaser and first consumer. Replacement parts may be obtained by calling 1-800-775-0703 or by writing: KrausUSA 12 Harbor Park Drive, Port Washington, NY 11050

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