A 1.5-bowl undermount sink typically pairs a full-size basin with a smaller prep or rinse bowl, but the listed options are mostly conventional 60/40 double-bowl sinks. The KRAUS KBU24 is the closest match to a 1.5-bowl setup because its low divider makes it easier to handle larger items across both bowls. The Dcolora is best for a larger cabinet and heavier-gauge steel, while the 30-inch Zeayoun suits a smaller kitchen. One listed product is a bathroom sink and is not a kitchen alternative.
| Product | Best For | Key Detail |
|---|---|---|
| KRAUS KBU24 | Low-divider flexibility | 32-inch 60/40 stainless steel sink |
| Dcolora DC-U7741 | Large kitchens | 36-inch, 16-gauge 304 stainless steel |
| KRAUS KGD-50WHITE | Quartz-composite style | 33-inch sink; undermount or drop-in |
| Zeayoun 30-inch sink | Smaller kitchens | 18-gauge stainless steel; 33-inch minimum cabinet |
| Los Flexi bathroom sink | Bathroom vanities only | Compact vitreous china basin |
KRAUS KBU24 Low-Divider Sink
Best for: Buyers who want separate basins but need more flexibility than a standard high-divider double sink. Its low divider makes this 60/40 configuration the closest listed option to a 1.5-bowl design.
The sink measures 32 by 20 5/8 inches, with a large 15 3/4-by-18 3/4-inch bowl and a smaller 13-by-16 1/2-inch bowl. It is made from 18-gauge stainless steel and has rounded corners intended to resist buildup. The kit includes two drain assemblies with strainers, hardware, and a template.
Limitation: It requires a minimum 36-inch cabinet, and the smaller bowl is still a full second basin rather than a dedicated half-bowl.
Dcolora 36-Inch 60/40 Sink
Best for: A roomy kitchen where a large undermount double bowl and thicker stainless steel are priorities. It was selected for its 16-gauge 304 stainless steel construction and stated 36-by-19-by-10-inch dimensions.
The two bowls have rounded corners, and the brushed interior is described as scratch-resistant and repairable for minor scratches. A sloped bottom and X-shaped water guide are designed to direct water toward the drain. The manufacturer also lists a noise-reducing patch and an anti-condensation layer.
Limitation: At 36 inches wide, it is a poor fit for many compact sink cabinets. Confirm cabinet and countertop measurements before selecting it.
KRAUS White Granite Double-Bowl Sink
Best for: Buyers who prefer a white quartz-composite appearance instead of stainless steel. Its 60/40 bowl layout offers separate washing and rinsing areas, and the product is listed for either drop-in or undermount installation.
The sink measures 33 by 22 inches and requires a minimum 36-inch cabinet. Its listed features include rounded corners, a sloped bottom, rear-set drains, two drain assemblies with strainers, hardware, cut-out templates, and a silicone mitt and trivet.
Limitation: This is a double-bowl sink, not a true 1.5-bowl model. Check that the 22-inch width works with the countertop and cabinet layout.
Zeayoun 30-Inch Undermount Sink
Best for: Buyers seeking a smaller-format stainless steel undermount sink. The product lists a 30-by-19-by-9-inch exterior and a minimum 33-inch base cabinet, making it more compact than the 32-, 33-, and 36-inch choices above.
It is made from 18-gauge T304 stainless steel and has a brushed finish. The listing describes a rubber mat and full-body coating for sound absorption and condensation control. Its stated cutout size is 28 by 17 inches, and the drain opening is 3 1/2 inches.
Limitation: The listing gives an internal bowl dimension of 28 by 17 by 8.75 inches but does not specify separate bowl measurements. Verify the basin layout and cutout with the seller or installation documentation before purchase.
Los Flexi Compact Bathroom Sink
Best for: A compact bathroom vanity, not a kitchen sink. It is included because it is the only other listed undermount basin, but its bathroom-specific design makes it unsuitable as a substitute for a kitchen 1.5-bowl sink.
The vitreous china basin measures about 17 15/16 by 13 by 7 1/16 inches, with a smaller interior bowl. Its glazed surface is described as easy to clean, and the rectangular shape is designed for limited vanity space.
Limitation: Its small dimensions and bathroom-lavatory design do not provide the capacity or two-bowl arrangement needed for kitchen tasks.
Buying Guide: How to Choose a 1.5-Bowl Undermount Sink
Do you need a true 1.5-bowl layout?
Check whether the smaller basin is genuinely compact or whether the sink is simply a 60/40 double bowl. None of the listed kitchen sinks is explicitly described as a dedicated 1.5-bowl model. The KRAUS KBU24 is the closest match because its low divider is intended to create more cross-basin flexibility.
What cabinet size and sink dimensions fit?
Measure the cabinet interior, countertop, and planned cutout before ordering. The KBU24 and KRAUS white sink list a 36-inch minimum cabinet; the Zeayoun lists 33 inches. The Dcolora is 36 inches wide, so confirm the manufacturer’s installation requirements rather than assuming exterior width alone determines fit.
Which material and layout suit your routine?
Stainless steel offers a metal finish, while the KRAUS white sink uses quartz composite. Compare bowl dimensions, divider height, drain placement, and included parts. If washing sheet pans or large cookware is common, a low divider can be more useful than two fully separated basins. A smaller second bowl can instead help keep rinsing or prep tasks separate.
Frequently Asked Questions
What is a 1.5-bowl kitchen sink?
It usually has one main basin and a smaller secondary basin for tasks such as rinsing, draining, or food preparation. Product descriptions can vary, so compare the actual bowl dimensions and divider.
Which listed sink is closest to a 1.5-bowl design?
The KRAUS KBU24 is the closest match because it has a 60/40 split and a low divider. It is still described as a double-bowl sink, not a true 1.5-bowl model.
Can a double-bowl sink work as an undermount?
Yes, when the specific product supports undermount installation and the cabinet and countertop are sized for it. Check the product’s installation details before buying.
Is the Los Flexi sink suitable for a kitchen?
No. It is listed as a compact bathroom lavatory sink made from vitreous china, not as a kitchen sink.