A Compact Undermount Sink Built for Tight Countertop Runs
The Karran Select Series SU73 is a 16 gauge stainless steel single bowl undermount kitchen sink sized for smaller kitchen configurations, secondary stations, and island installations where a full 30-plus-inch sink would overrun the cabinet. Its tight-radius corners and 8-1/4 inch bowl depth put serious workspace in a footprint that works where most single bowls won't.
Key Features
• 16 gauge stainless steel construction delivers a noticeably thicker, more rigid bowl than standard 18 gauge sinks in the same price range.
• Tight-radius corners give the bowl a squared, contemporary profile suited to modern and transitional kitchen designs.
• 8-1/4 inch bowl depth handles tall cookware and deep pots without the strain of a shallower basin.
• Undermount installation keeps the counter surface clean and uninterrupted, with no rim to collect debris at the sink edge.
• Compact 21-1/4 by 17-1/4 inch footprint fits cabinet runs and island cutouts where larger sinks cannot.
Where This Sink Earns Its Place
The SU73 is the right call when the available cabinet run is too short for a conventional kitchen sink but the workflow still demands depth and capacity. A kitchen island with a prep zone, a butler's pantry, a bar setup adjacent to the main kitchen, or a small apartment kitchen where counter real estate is precious — these are the situations where a 21-1/4 inch undermount sink stops being a compromise and becomes the correct specification. The 8-1/4 inch bowl depth means this compact footprint does not trade reach and working volume for its smaller overall size.
For cabinetmakers and contractors specifying or building out these spaces, the Select Series SU73 gives clients 16 gauge quality in a size that is rarely available at this construction standard. That matters when a client wants the look and feel of a premium stainless sink without the sink dominating the run.
Construction and Finish
Select Series sinks are built to 16 gauge, the same material thickness found on professional-grade and commercial-adjacent kitchen sinks. The brushed satin interior finish reduces the visibility of light scratching from daily use and keeps the bowl looking consistent over time. Tight-radius corners are a deliberate design choice for this series — they produce the squared bowl geometry associated with higher-end fabrication and give the interior more usable flat bottom area than a fully rounded corner allows. The undermount configuration means the countertop edge finishes directly to the bowl rim with no visible sink perimeter above the counter surface.
Who Specifies This Sink
Designers working on compact kitchen layouts, renovation contractors retrofitting into existing cabinetry with limited sink-base widths, and cabinet shops fabricating island or butler's pantry builds will find the SU73 a dependable spec. The 16 gauge Select Series construction satisfies clients who want durability they can feel, and the tight-radius profile satisfies design briefs that call for a modern or transitional aesthetic. Homeowners outfitting a smaller kitchen who do not want to accept a thin-gauge sink will also find this an honest upgrade over entry-level options.
What countertop materials work with this sink?
The SU73 is an undermount sink suitable for installation in stone, quartz, and solid surface countertops. For laminate countertops, look to the Karran Edge Series, which is engineered for seamless integration with laminate. The Select Series uses a standard undermount method and is not a seamless-capable series.
Does the sink include a drain or basket strainer?
A basket strainer and drain accessories are not included with the bare SU73 SKU. The drain opening accepts a standard 3-1/2 inch kitchen basket strainer, which is available separately. Confirm your drain and plumbing configuration before completing the countertop cutout.
How does 16 gauge differ from the 18 gauge sinks I usually see?
Gauge works inversely to thickness: 16 gauge steel is thicker and denser than 18 gauge. In practice, a 16 gauge bowl feels more solid underhand, resists flex and drumming more effectively, and generally holds up better under daily use. It is a meaningful upgrade in a side-by-side comparison.
Where does the faucet mount on this sink?
The SU73 has no faucet deck, so the faucet and any accessories such as a soap dispenser mount through the countertop. Plan faucet hole location and countertop drilling before fabrication is complete.
Compact Footprint, Full-Gauge Quality
The Select Series SU73 closes the gap between a sink that fits a smaller cabinet run and one built to a standard worth specifying — 16 gauge construction, a deep bowl, and a contemporary profile in a footprint that works where most undermount sinks do not.
