What size base cabinet is required for this sink?

This model is designed to fit standard base cabinets measuring 36 inches or wider.

Is mounting hardware included with the sink?

Yes, a paper template and all necessary mounting hardware are included in the box for installation.

What is the gauge of the stainless steel used?

This sink is crafted from durable 18 gauge stainless steel for reliable everyday strength.

Does this sink feature an overflow?

No, this model does not include an overflow.

What size are the drain openings?

The drain size is 3 1/2 inches, situated in a front center placement.

How are the corners shaped inside the bowls?

The sink features big radius corners designed to make cleaning easier and prevent debris buildup.

Is this kitchen sink cUPC certified?

Yes, this stainless steel sink is cUPC certified.

What are the dimensions of the inner bowls?

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.

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Blue Bath BB73 Kitchen Sink Steel Undermount 70/30 31.5 x 20.5 18 Gauge

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Blue Bath BB73 Kitchen Sink Steel Undermount 70/30 31.5 x 20.5 18 Gauge

SKU # BB73

In stock

Generally In Stock, ships out in 2 work days.

$139.00

$278.00

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Overview Specifications Key Features Installation/Care FAQ

Overview

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
Standard 36 inch base cabinet setups
Households wanting durable 18 gauge stainless steel surfaces
Cooks who appreciate smooth radius corners for effortless cleanup

Technical Specifications

More Information
Availability	In Stock (2 days)
Finish	Stainless Steel
Bowl Type	Double Bowl
Drain Size	3 1/2
Shape	Rectangular
Width	20 5/8
Material	Stainless Steel
Length	31 1/2
Installation Type	Undermount
Height	7
Gauge	18
Faucet Holes	0
Drain Placement	Front Center
Depth	7
Bowl Style	Rounded
Color	Stainless Steel
cUPC Certified?	Yes
Inner Bowl	18 1/2" x 17 11/16"
Item Weight	14
Second Inner Bowl	15 15/16" x 10 16"
UPC	850061567277

Ship Details

Ship Details
Ship Weight	19.00
Ship Size	12(H) * 22(W) * 34(L)
Ship State	CA
Ship Zip	90016

Installation Specs Care

Key Features

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.

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.

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.