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Blanco Diamond
20 Inch Drop-In/Undermount Double Bowl Granite Prep Sink

8" Large Bowl Depth 80% Granite Non-Porous
Color: Metallic Gray
Metallic Gray
quick specs
Width: 20 1/2 Inch
Length: 15 Inch
Depth: 8 Inch
Cutout Width: 19 3/4 Inch
Cutout Length: 14 1/4 Inch
Base Cabinet Size Required: 24 Inch
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Product Information
Brand: Blanco
Series: Diamond
Model: 440188
Width: 20 1/2 Inch
Length: 15 Inch
Depth: 8 Inch
Cutout Width: 19 3/4 Inch
Cutout Length: 14 1/4 Inch
Base Cabinet Size Required: 24 Inch
Installation Type: Drop-In/Undermount
Room: Kitchen
Material: Granite
Color: Grey
Bowls: Double Bowl
Basket Strainer Included: No
Technical Details
ADA Compliant: No
UPC: 747943022767

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From the Manufacturer

Lesser sinks don't stand a chance. The non-porous material resists stains like coffee, tea and red wine, while its hard surface resists scratches and chips. And with six classic colors to choose from, this sink was designed to complement any décor.

BLANCO is one of the leading providers of innovative, design-oriented system solutions for work stations in domestic kitchens and food service equipment. With the support of their business partners they, as providers of systems, develop and design attractive solutions for work places which make work in domestic kitchens, food service and in medical operational areas less onerous.

They recognize, inspire and fulfill customer's desires.

They evolve innovative, flexible solutions which are exemplary in design, function, quality and service.

They use the expertise, commitment and creativity of their employees as well as advanced and environmentally-friendly technology in order to always stay one step ahead and to be the most attractive supplier in the world.

They want to be a "5-star company" and inspire their customers.

Manuals & Guides

  • Specifications
  • Features
  • Reviews


80% Solid Granite
Required Cabinet Size:  
24" (Drop-In), 22 1/2" (Undermount)
Drain Hole:  
3 1/2" Left Drain, 2" Right Drain
Pre-Drilled Holes:  
Cutout Template:  
Undermount Installable:  
Requires 10 Undermount Clips
Overall Width:  
20 1/2"
Overall Length:  
Overall Depth:  
Large Bowl Width:  
11 3/20"
Large Bowl Length:  
11 1/2"
Large Bowl Depth:  
Small Bowl Width:  
5 13/20"
Small Bowl Length:  
10 2/5"
Small Bowl Depth:  
Cutout Width:  
19 3/4"
Cutout Length:  
14 1/4"
Cutout Corner Radius:  


  • Required Outside Cabinet for drop-in installation: 21"
  • Required Cabinet for undermount installation: 23"
  • 80% solid granite
  • Heat resistant up to 536°F
  • Unsurpassed cleanability backed by industry leading 7 patents!
  • Resistant to scratches, stains and all household acids and alkali solutions
  • Template provided
  • Under mount clips NOT included
  • Limited lifetime warranty
Optional Accessories
  • Cutting Board (Fits drop-in only) - 440225
  • Deluxe Steel Strainer 2" Chrome - 440031
  • Stainless Steel Sink Large Grid - 221012
Code/Standards Compliance
  • ANSI Z124.6-97
  • IAPMO/UPC listed
  • BLANCO'S SILGRANIT II Series sinks feature a LIMITED LIFETIME WARRANTY to be free of all manufacturing defects under normal use. See the complete warranty for details.

Blanco Diamond 440188 Reviews