A Clean White Undermount Sink for Solid Countertop Builds

The Karran QU-671-WH is a single-bowl quartz undermount kitchen sink in white, sized for a 27-inch or wider base cabinet and designed to mount beneath granite, quartz, or solid surface countertops.

Key Features

• Single-bowl undermount design that keeps the countertop surface unbroken above the basin.
• White quartz composite construction made from natural quartz and acrylic resin.
• 9-inch bowl depth for washing full-size pots and pans without crowding the basin.
• Fits a 27-inch minimum cabinet width, suited to standard base cabinet layouts.
• cUPC and IAPMO certified for plumbing code compliance.
• 3-1/2 inch drain opening compatible with standard drain and basket strainer fittings.

Where White Works in a Kitchen

White is the one sink color that reads as part of the counter rather than a contrast to it. In a white or light-toned quartz countertop, the sink disappears into the surface. In a darker stone kitchen, it becomes a quiet visual anchor without competing with the cabinet finish or hardware. This single-bowl layout suits kitchens where one deep, uninterrupted basin handles the workload better than two smaller bowls, including island prep sinks, galley kitchens with limited counter runs, and secondary prep stations where a single bowl is all the space allows.

Quartz Composite Material and Finish

The sink body is quartz composite, a dense material made from natural quartz and acrylic resin. The white finish runs through the body rather than sitting as a surface coating, so chips and nicks do not expose a different color underneath. The material is non-porous, which keeps food residue from setting into the surface and makes daily cleanup straightforward. It is designed for installation into granite, quartz, and solid surface countertops, where the undermount bond conceals the sink rim entirely and creates a smooth transition from counter to basin.

Planning the Installation

This is a sink to specify into a new countertop. The undermount method requires the countertop to be fabricated around the sink opening, so it is not a drop-in replacement for an existing cutout. The 27-inch minimum cabinet width is the baseline; confirm the base cabinet and countertop dimensions against the 21-3/8 by 17-7/8 inch footprint before the counter is cut. Faucet holes are not part of this sink, so the countertop deck handles faucet placement. The 3-1/2 inch drain opening accepts a standard basket strainer.

Common Questions

A White Quartz Basin That Stays Out of the Way

Choose the QU-671-WH for a single-bowl undermount sink in white quartz that integrates cleanly into a new countertop and holds up to everyday kitchen use without demanding attention.