The BLANCO DIAMOND 1-3/4 Bowl Dual Mount Sink is a durable and versatile double-bowl kitchen sink featuring a 60/40 configuration that balances a spacious main bowl with a smaller secondary bowl for multitasking in the kitchen. Constructed from BLANCO’s SILGRANIT® granite composite, this sink delivers exceptional resistance to heat up to 536 °F, scratches, stains, chips, and impact while maintaining a non-porous, easy-to-clean surface that repels liquids and debris. Designed with a dual-mount installation, it can be installed as either a drop-in or undermount sink to suit your countertop and design preferences. Pre-drilled for a single faucet hole with additional knockout holes for accessories, this sink combines practicality with lasting performance backed by BLANCO’s limited lifetime warranty.

Key Features

• Dual Bowl (60/40 Split) — Larger wash bowl paired with a smaller prep bowl maximizes functionality for everyday kitchen tasks. 

• Premium SILGRANIT® Construction — Engineered granite composite is heat resistant up to 536 °F and resists stains, scratches, chips and impact. 

• Dual Mount Design — Can be installed as drop-in or undermount for maximum flexibility in countertop installations. 

• Easy-Clean, Non-Porous Surface — Smooth surface repels liquids and food residue for everyday cleanup. 

• Rear Drain Location — Efficient placement maximizes usable bowl space and storage beneath the sink. 

• Pre-Drilled Faucet + Accessory Knockouts — Comes with one faucet hole and additional knockouts for soap dispensers or other accessories. 

• Limited Lifetime Warranty — Coverage against manufacturing defects under normal residential use. 

Available Color & Finish Options

The BLANCO DIAMOND 1-3/4 Bowl Dual Mount Sink is available in a range of SILGRANIT® quartz composite finishes to complement modern kitchen design trends: 

Coal Black
A rich, deep dark pitch-black finish with a bold, dramatic presence. Coal Black delivers a sleek, modern look that anchors the kitchen with confidence and pairs beautifully with contemporary cabinetry and metallic accents.

Anthracite
A deep charcoal-black tone with subtle granite flecking that adds depth and texture. Anthracite offers the sophistication of black with a softer, more dimensional stone appearance.

Cinder
A dark slate gray inspired by natural stone. Cinder strikes the perfect balance between black and gray, offering a refined, grounded neutral that complements both modern and transitional spaces.

White
A crisp, clean white with a timeless appeal. Bright and versatile, this classic finish enhances light and contrast, making it an effortless choice for both kitchens and laundry rooms.

Truffle
A soft, earthy taupe blending warm brown and gentle gray tones. Truffle brings subtle warmth and organic elegance, creating a refined neutral that pairs beautifully with natural materials and layered finishes.

Café Brown
A warm, medium brown reminiscent of milk chocolate. Café Brown adds richness and comfort to the space, offering a welcoming, grounded look with understated sophistication.

Soft White
A creamy, warm white designed to complement quartz and stone surfaces. Soft White delivers a gentle, inviting tone that feels refined and cohesive rather than stark. Blanco’s newest color has been an immediate success, answering the industry’s demand for a perfectly balanced, in-between tone.

Volcano Gray
A rich mid-tone medium gray with warm undertones and a smooth, stone-inspired finish. Deeper than light gray but lighter than charcoal, Volcano Gray offers a substantial, modern look and pairs exceptionally well with stainless steel and dark metal appliances.

Featured Throughout the Entire Color Collection:  All Blanco Silgranit sinks are finished with a sophisticated eggshell sheen, offering a matte appearance enhanced by a gentle, light-reflecting glow.

Product Specifications

• Brand: BLANCO

• Collection: DIAMOND SILGRANIT®

• Material: SILGRANIT® granite composite (approx. 80% granite) 

• Installation: Dual Mount (Drop-in or Undermount) 

• Number of Bowls: 2 (Double Bowl — 60/40 split) 

• Overall Dimensions: 33″ (W) × 22″ (front-to-back) × ~9.5″ (H) 

• Left Bowl Size: ~18.6″ (L) × 16.5″ (W) × 9.5″ (D) 

• Right Bowl Size: ~16.8″ (L) × 12.5″ (W) × ~8″ (D) 

• Bowl Depths: ~9.5″ and ~8″ (deeper main bowl, shallower secondary bowl) 

• Drain Opening: Standard 3.5″ (basket strainer sold separately) 

• Faucet Holes: 1 (additional knock-outs provided) 

• Minimum Cabinet Size: 36″ recommended for undermount, 33″ for drop-in Shape: Rectangular 

• Certifications: CSA B45.8-18 / IAPMO Z403-2018 compliant 

• Warranty: Limited lifetime manufacturer warranty 

What’s Included

• BLANCO DIAMOND 1-3/4 Bowl SILGRANIT® Dual Mount Sink
• Installation instructions & cut-out template
• Limited lifetime warranty documentation 

Note: Faucet, basket strainers, grids, colanders, and decorative drain covers are sold separately. 

Ideal For

• Kitchens needing multitasking workspace with two bowl areas
• Mixing wash, prep, and rinse tasks efficiently
• Seamless integration with quartz, granite, or solid surface counters
• Contemporary and transitional kitchen designs