Karran QU-722-BI Quartz Sink For New Installs

Karran QU-722-BI quartz sink is a single bowl undermount unit designed for new kitchen countertops where a fresh cutout is planned. The 33-1/2 inch by 21 inch external bowl dimensions define the cabinet and countertop span, so layouts can be planned accurately before templating. Inside, the 30 inch by 18 inch by 9 inch internal bowl size provides a defined working basin depth and footprint, which affects how large pots and pans sit in the sink and how water contains during daily use. The bowl is manufactured from 80 percent crushed quartz plus 20 percent acrylic resin, creating a quartz-based material that shapes the sink structure and surface. A 1-1/4 inch by 3/4 inch machined resin matrix rim forms the transition area between sink and countertop, which is critical for undermount seating and sealant contact. The sink is supplied in a bisque color, supporting design choices where a light-toned quartz appearance is preferred.

Quartz Sink Details That Support Kitchen Workflows

• The 33-1/2 inch by 21 inch external bowl dimensions set the overall footprint, helping align cabinet sizing and stone cut planning for a predictable undermount fit.
• The 30 inch by 18 inch by 9 inch internal bowl dimensions define the usable basin volume, which affects how dishes, cookware, and cleaning tasks fit within the sink space.
• The 80 percent crushed quartz plus 20 percent acrylic resin construction forms a quartz composite body, giving the sink its solid feel and consistent structure during everyday kitchen use.
• The 1-1/4 inch by 3/4 inch machined, resin matrix rim creates a uniform contact band with the countertop, which matters for even support and sealant application along the sink perimeter.
• The 3-1/2 inch waste opening matches a standard drain size, simplifying alignment of the sink cutout and drain location with common kitchen plumbing layouts.
• The sink bowl surface has a matte finish, providing a low-sheen working surface that affects how the sink visually blends with surrounding countertop materials and lighting.

Undermount Installation And Countertop Fit Details

This quartz bisque single bowl undermount sink is designed specifically for undermount installation, so it sits beneath the countertop with the rim bonded to the underside of the stone. It may not be top mounted, which focuses layout decisions on undermount-only methods. The sink can only be installed in new countertops, not in existing countertops with an existing sink cutout, so it aligns with projects where stone is being fabricated or replaced. This sink may be undermounted to all stone products, giving flexibility across different stone materials during fabrication. An 1/8 inch overhang is recommended at the cutout, creating a slight countertop reveal over the bowl edge that affects cleanup and edge appearance, though flush installation is also possible where a different visual treatment is desired.

Where This Karran Quartz Undermount Sink Performs

Using The Quartz Bisque Sink In Stone Tops

This Karran quartz undermount sink is configured for use with stone countertops, as it may be undermounted to all stone products. The 33-1/2 inch by 21 inch external bowl dimensions give fabricators a clear outline for slab layout, seam planning, and cut sequencing around the sink centerline. With a 30 inch by 18 inch by 9 inch internal bowl, the working basin sits deep within the cabinet, which influences how water splashes stay contained and how tall items rest below the counter surface. The 3-1/2 inch waste opening places a standard-size drain point at the bowl bottom, guiding the location of plumbing rough-ins relative to the cabinet base. The sink bowl surface has a matte finish, shaping how the bisque color reads against polished or honed stone finishes in real kitchen lighting.

Details That Support Accurate Undermount Results

The 1-1/4 inch by 3/4 inch machined, resin matrix rim gives a defined bonding surface, which matters when positioning the sink under stone and applying adhesive for a consistent joint. All external dimensions are approximate to 1/4 inch, providing an understood tolerance band when preparing cut files and physical templates. Because the sink can only be installed in new countertops and not in existing countertops with an existing sink cutout, layout work centers on new fabrication rather than adapting older openings. The ability to undermine this sink to all stone products means the same QU-722-BI model can be specified across different stones in a project, keeping the cut geometry consistent. Digital templates for CNC machines are available at www.karran.com, which supports automated stone machining workflows where precise sink outlines are cut directly from electronic files.

Common Questions About This Quartz Undermount Sink

Selecting This Karran Quartz Sink For Stone Tops

The Karran QU-722-BI quartz sink brings a defined 33-1/2 inch by 21 inch undermount footprint, a 30 inch by 18 inch by 9 inch internal bowl, and a 3-1/2 inch waste opening to new stone countertop projects. The 80 percent crushed quartz plus 20 percent acrylic resin construction and 1-1/4 inch by 3/4 inch machined resin matrix rim support stable undermount installation. For kitchens planned around new stone fabrication, this single bowl bisque undermount sink offers clear dimensions, a matte finish surface, and an undermount-only configuration ready to integrate into a coordinated layout.