Kraus Black Onyx 31 in Review: Who It Fits and Who Should Skip It
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This kraus black onyx 31 in review covers the KGU-413B undermount sink. It measures 30.5 inches in length and 17.1 inches in width. The bowl depth is 8 7/8 inches, providing ample space for large cookware. Constructed from quartz composite, the surface is non-porous and resistant to scratches. This single-bowl design fits into a minimum 33-inch cabinet. The black finish offers a modern look that complements various kitchen styles. You get a stainless steel drain assembly and a kitchen towel with the purchase. The sink weighs 30.4 pounds, ensuring stability during use.
What stands out
- Quartz composite material resists impact and scratches
- Undermount installation allows seamless countertop cleaning
- 8 7/8-inch bowl depth contains splatter
- Non-porous surface stands up to household cleaners
Who it fits
Good fit for
You should choose this sink if you want a single, deep bowl for washing large pots. The undermount style suits those who prefer easy cleanup by wiping debris directly into the basin. The quartz composite material is ideal for kitchens where durability against scratches and impact matters. If your cabinet is at least 33 inches wide, this 30.5-inch sink fits perfectly. The black color works well with modern or traditional decor schemes.
Who should skip it
Skip this option if you need two separate bowls for rinsing and washing simultaneously. The single-bowl configuration limits multitasking compared to double-basin models. If you require a top-mount sink for easier installation, this undermount design is not suitable. The fixed black color may not match lighter countertop materials. Additionally, the minimum 33-inch cabinet requirement excludes smaller kitchen layouts. You also cannot choose other colors from the available variations.
Verdict: The Kraus Black Onyx 31-inch sink offers a durable, deep single bowl with easy maintenance. It is a solid choice for modern kitchens with adequate cabinet space.
Key specs explained for this sink
Material: Quartz Composite
This material blends natural quartz with acrylic resin to create a hard, non-porous surface. You benefit from resistance to scratches, impact, and stains. The smooth finish allows for easy cleaning with standard household cleaners. Unlike stainless steel, it dampens sound and resists water spots. This makes it a practical choice for busy kitchens where durability and low maintenance are priorities.
Installation Type: Undermount
Undermount installation attaches the sink below the countertop edge, creating a seamless transition. You can wipe debris directly from the counter into the basin without a raised rim. This design simplifies cleanup and offers a modern aesthetic. It requires a solid surface countertop like granite or quartz for proper support. This method is preferred for contemporary kitchen styles.
Bowl Depth: 8 7/8”
A depth of nearly nine inches provides substantial vertical space in the basin. You can soak large pots and pans without water splashing over the edge. This depth helps contain messes during washing. It is deeper than standard shallow sinks, making it suitable for handling bulky cookware. Check your cabinet clearance to ensure this depth fits your plumbing configuration.
Minimum Cabinet Size: 33”
This sink requires a base cabinet at least 33 inches wide for proper fit. You must verify your existing cabinet dimensions before purchase. A 30.5-inch sink needs extra space for mounting hardware and plumbing connections. If your cabinet is smaller, this model will not install correctly. Always measure your current cabinetry width to ensure compatibility with this specific undermount design.
Design and Build Quality
The listing describes this Kraus sink as a quartz composite unit. This material blends natural quartz with acrylic resin. You get a hard, non-porous surface that resists scratches, impact, and stains. The finish includes metallic particles for a shimmering look. It mimics natural granite but remains smooth for easy cleaning. You can wipe crumbs directly into the bowl without worrying about debris trapping.
Externally, the sink measures 30.5 inches in length and 17.1 inches in width. It weighs 30.4 pounds, indicating a solid build. The bowl depth is 8 7/8 inches. This depth helps contain splatter and holds large pots. The installation type is undermount. This creates a seamless transition from countertop to sink. There is no exposed mounting deck to clean around. You simply wipe the counter straight into the basin.
According to the listing, the minimum cabinet size required is 33 inches. This ensures proper fit for the 30.5-inch exterior dimensions. The single bowl configuration offers a large, uninterrupted workspace. You do not have a divider splitting the area. This layout suits those who wash large items frequently. The black color provides a modern contrast to light countertops. The design prioritizes function and durability over decorative complexity.
Setup And Daily Use Guide
This sink requires a minimum 33-inch base cabinet for installation. The undermount design attaches beneath the countertop, creating a seamless edge. You can wipe crumbs and water directly into the basin without catching debris on a raised rim. This setup simplifies daily cleanup routines significantly.
The exterior dimensions measure 30.5 inches in length and 17.1 inches in width. The bowl depth is 8 7/8 inches, offering substantial volume for large pots and pans. The single-bowl configuration provides an uninterrupted workspace. You avoid the constraints of double sinks, making it easier to fit wide baking sheets or large cookware.
Daily use involves maintaining the smooth, non-porous quartz composite surface. The material resists stains and stands up to standard household cleaners. Gently rounded corners help minimize buildup in hard-to-reach spots. You can use typical kitchen cleaning products without worrying about damaging the finish.
The sink includes a stainless steel drain assembly with a removable basket strainer. This component helps capture food particles before they enter the plumbing. You should remove the strainer periodically to rinse away debris. The deep bowl design helps contain splatter during washing.
If you frequently wash large items, the single bowl and significant depth are practical advantages. The undermount style requires precise countertop cutting but offers a modern aesthetic. You must ensure your cabinet meets the minimum size requirement. The quartz composite surface provides durability against impact and scratches during routine use.
Before You Buy This Sink
This sink fits standard 33-inch cabinets. It requires an undermount cutout. You must verify your countertop material supports undermount installation. Granite and quartz tops work well. Laminate needs special brackets. The bowl holds large pots. It does not include a garbage disposal. You may need to buy one separately. The drain assembly is included. Clean with mild soap. Avoid abrasive pads. The non-porous surface resists stains. This model suits modern kitchens. It pairs well with stainless steel appliances. Check your faucet holes. This sink has no pre-drilled holes. You need a separate faucet. Compare this to other single-bowl options. It offers deep capacity. It lacks a drying rack. You may want to add one. Ensure your plumbing matches the drain size. This sink is heavy. Handle with care during installation. It fits most standard kitchens.
Check before you buy
- Verify your cabinet is at least 33 inches wide.
- Confirm your countertop supports undermount installation securely.
- Purchase a separate garbage disposal if needed.
- Ensure you have a compatible faucet ready.
- Check that your plumbing fits the included drain.
The product at a glance
Kraus 31-Inch Undermount Quartz Composite Sink
Best for: Single-bowl kitchen renovations needing durability
- Installation Type
- Undermount
- Material
- Quartz Composite
- Exterior Dimensions
- 30 1/2” L x 17” W x 9 1/4” D
- Bowl Depth
- 8 7/8”
- Minimum Cabinet Size
- 33”
- Bowl Configuration
- Single Bowl
View on Amazon: Kraus 31-Inch Undermount Quartz Composite Sink Affiliate link
This Kraus Black Onyx sink is a 31-inch single-bowl undermount model made from quartz composite. It measures 30.5 inches long and 17 inches wide, fitting into a minimum 33-inch cabinet. The deep 8 7/8-inch bowl helps contain splatter. Its smooth, non-porous surface resists stains and scratches. You get a durable, easy-to-clean option that suits modern or traditional kitchens.
Pros
- Quartz composite material resists impact and scratches
- Undermount installation allows seamless countertop cleanup
- Deep 8 7/8-inch bowl contains splatter
- Non-porous surface is easy to clean
Cons
- Single bowl configuration limits separate washing areas
- Requires a minimum 33-inch cabinet size
- Sold without a garbage disposal included
Good fit if
- You want a durable, stain-resistant black sink
- You prefer a single-bowl layout for large pots
- You have a 33-inch or larger base cabinet
Skip if
- You need a double-bowl sink for multitasking
- Your base cabinet is smaller than 33 inches
- You require an integrated garbage disposal
Verdict: Kraus Black Onyx 31-Inch Undermount Sink is a sturdy, deep single-bowl option for those with 33-inch cabinets who value easy maintenance and a modern undermount look.
Specifications side by side
| Spec | Kraus 31-Inch Undermount Quartz Composite Sink |
|---|---|
| Installation Type | Undermount |
| Material | Quartz Composite |
| Exterior Dimensions | 30 1/2” L x 17” W x 9 1/4” D |
| Bowl Depth | 8 7/8” |
| Minimum Cabinet Size | 33” |
| Bowl Configuration | Single Bowl |
| Target Space | Kitchen |
| Color | Black |
| Dimensions | 30.5 × 17.1 × 8.66 inches |
| Weight | 30.4 pounds |
| Size | 31 Inch, Single Bowl without Garbage Disposal |
| Model | KGU-413B |
Frequently asked questions
Is the Kraus Black Onyx 31-inch sink compatible with a garbage disposal?
No, this model does not include a garbage disposal. The listing specifies it is a single-bowl unit without the disposal attachment. You will need to purchase and install a separate disposal unit if you require that feature. The basin is designed for manual washing or use with other accessories.
What cabinet size is required for this undermount sink?
You need a minimum 33-inch base cabinet for installation. The sink itself measures 30.5 inches in length. This extra space allows for the undermount mounting hardware and proper fit within the cabinetry. Ensure your existing cabinet meets this width requirement before proceeding with the purchase.
How deep is the basin in this Kraus sink?
The bowl depth is 8.66 inches. This deep profile provides ample space for washing large pots and pans. It helps prevent water splashing out during heavy use. The substantial depth is a key feature for handling bulky kitchen cookware efficiently.
What material is used to make this sink?
This sink is constructed from granite composite material. Specifically, it is a quartz composite blend. This composition creates a hard, non-porous surface that resists scratches, stains, and impact. The material offers durability and a modern aesthetic suitable for high-traffic kitchens.
Does this sink come with a drain assembly included?
The provided data does not mention a drain assembly. The specifications focus on the basin dimensions, material, and weight. You should check the full product packaging details or contact the manufacturer to confirm if the drain kit is included with the sink unit.
Can I install this sink in a laminate countertop?
Yes, but you must use special brackets. Undermount installation on laminate requires specific mounting hardware to secure the sink properly. Verify that your countertop material can support the undermount style. Granite and quartz tops work well, but laminate needs careful preparation to ensure a secure fit.