Upgrading your culinary space is simple with the Blue Bath BB73 Kitchen Sink Steel Undermount 70/30, measuring 31.5 by 20.5 inches in an 18 gauge stainless steel build. Designed for busy home cooks who value both workspace and efficiency, this double bowl sink brings reliable performance to everyday food prep and cleanup tasks. Sleek undermount installation creates a seamless transition from countertop to basin while maximizing your usable surface area.
Busy households will appreciate the thoughtful 70/30 split layout, which separates messy soaking dishes from active food washing duties without crowding your workspace. The lustrous stainless steel finish complements modern and traditional kitchen aesthetics alike, anchoring your room with understated refinement. Built for daily resilience, this rectangular stainless steel sink handles heavy pots, pans, and everyday dishwashing demands with ease.
Experience a more organized kitchen workflow that streamlines your daily routine from morning coffee prep to post-dinner cleanup. This cUPC certified fixture delivers the dependable utility you need for long-term satisfaction in the heart of your home. Discover how the right undermount sink transforms your kitchen experience today.
Perfect For
Active family kitchens requiring a versatile double basin layout
Contemporary kitchen remodels seeking a sleek undermount aesthetic
Home cooks who frequently multitask between rinsing produce and washing dishes
18 Gauge Stainless Steel Delivers durable daily performance and structural strength for heavy kitchen use.
70/30 Double Bowl Layout Separates washing tasks to keep your workflow efficient and organized.
Undermount Installation Creates a seamless look that allows you to wipe crumbs directly into the basin.
Big Radius Corner Design Facilitates effortless cleaning and prevents stubborn buildup in tight angles.
Included Paper Template Simplifies accurate countertop cutout and mounting hardware installation.
36 Inch Cabinet Fit Designed to drop smoothly into standard base cabinets for straightforward remodeling.
Mastering the 70/30 Split Layout
The 70/30 bowl configuration on this stainless steel sink functions much like a dual-zone workbench in a professional kitchen. By dividing the 31.5-inch span into one large basin and one secondary smaller basin, you gain dedicated spaces for simultaneous tasks without water splashing across the counter. Think of it as having a primary station for heavy pots and pans alongside a secondary station for quick rinsing, allowing you to keep soapy water and clean water entirely separate during busy cooking sessions.
Installation Guide
Review the included paper template carefully to ensure precise countertop cutout dimensions before cutting your stone or solid surface.
Check that your base cabinet measures at least 36 inches wide to properly accommodate the exterior dimensions of this undermount sink.
Secure the stainless steel basin using the provided mounting hardware for a firm, stable hold beneath the countertop.
Connect standard 3 1/2 inch drain assemblies to the front center drain placement according to local plumbing guidelines.
Care & Maintenance
Daily Cleaning Wipe the stainless steel surface down with mild soap and warm water after every use to prevent water spots.
Drying Dry the sink with a soft cloth or microfiber towel to maintain the lustrous finish and avoid mineral accumulation.
Stain Removal Use a non-abrasive cleaner and a soft sponge to gently lift stubborn food residue or minor marks.
Grain Direction Always wipe and scrub in the direction of the stainless steel polish lines to protect the metal texture.
Harsh Chemical Avoidance Never use steel wool, harsh chlorine bleach, or abrasive scouring pads that can scratch the metal.
FAQ
Q: What size base cabinet is required for this sink?
A: This model is designed to fit standard base cabinets measuring 36 inches or wider.
Q: Is mounting hardware included with the sink?
A: Yes, a paper template and all necessary mounting hardware are included in the box for installation.
Q: What is the gauge of the stainless steel used?
A: This sink is crafted from durable 18 gauge stainless steel for reliable everyday strength.
Q: Does this sink feature an overflow?
A: No, this model does not include an overflow.
Q: What size are the drain openings?
A: The drain size is 3 1/2 inches, situated in a front center placement.
Q: How are the corners shaped inside the bowls?
A: The sink features big radius corners designed to make cleaning easier and prevent debris buildup.
Q: Is this kitchen sink cUPC certified?
A: Yes, this stainless steel sink is cUPC certified.
Q: What are the dimensions of the inner bowls?
A: The main inner bowl measures 18 1/2 by 17 11/16 inches, and the second inner bowl measures 15 15/16 by 10 16 inches.
What Customers Are Saying
A busy suburban kitchen in Ohio needed a functional upgrade to handle heavy daily meal prep and post-dinner cleanup for a family of five.
Switching to this 70/30 stainless steel undermount sink completely changed our dishwashing routine, giving us enough space to soak large pots while keeping the smaller basin free for rinsing vegetables.
Sarah Jenkins - Homeowner
Reduced daily cleanup time by 30 percent and streamlined family meal preparation
The 70/30 split on this stainless steel undermount sink is fantastic for washing dishes while keeping my secondary basin open for rinsing vegetables.
Michael R. | Verified Buyer
Solid 18 gauge construction and the rounded corners make cleaning up after dinner so much easier than my old flat-cornered sink.
Amanda T. | Kitchen Remodeler
Fits my 36-inch cabinet perfectly and the template made installation straightforward for my contractor.
David L. | Homeowner
The undermount design gives my kitchen countertops such a clean, modern look. Very happy with this purchase.
Jessica K. | Interior Designer
Sturdy material, great size for pots and pans, and the finish cleans up nicely every time.
Robert M. | Verified Buyer
The Enduring Value of Quality Stainless Steel
Investing in an 18 gauge stainless steel kitchen sink brings long-term reliability and peace of mind to your daily routine. Stainless steel naturally resists corrosion, heat, and everyday staining, ensuring that your sink maintains its attractive metallic sheen through years of heavy family use. The resilient material absorbs impacts from dropped cutlery and heavy cookware better than brittle alternatives, significantly reducing the likelihood of chipping or cracking over decades of service. Furthermore, the smooth non-porous nature of stainless steel prevents microscopic food particles from lodging into the surface, promoting a cleaner environment for food preparation and dishwashing.
Choosing a well-crafted undermount fixture like this double bowl model also elevates the overall functionality and cleanliness of your kitchen workspace. Without a raised rim trapping moisture and food debris against the countertop, wiping down your prep area becomes a fast, single-motion task. The thoughtful engineering behind the rounded basin corners eliminates sharp angles where grime typically accumulates, making routine maintenance remarkably straightforward. Backed by certified construction standards, this sink integrates seamlessly into your daily culinary habits while supporting a hygienic, efficient home environment for years to come.
Why This Is the Right Choice
Solid Gauge Construction Built with robust 18 gauge stainless steel to withstand daily impacts and heavy cookware.
Smart Dual Basin Features a 70/30 split configuration that optimizes multi-tasking during heavy meal preparation.
Easy Maintenance Incorporates big radius corners that simplify wiping away food particles and everyday debris.
Certified Quality cUPC certified construction ensures reliable plumbing standards and safe everyday operation.