BK-S3218 Commercial Kitchen Sink 813×457×229mm SUS304/SUS316 16 Gauge Undermount Topmount Flushmount

Why 813×457mm for Commercial Operations

The Dimension That Handles Commercial Kitchen Loads

At 813×457mm with a 229mm depth, the BK-S3218 is in the category of commercial kitchen primary sinks — the sink that handles the heaviest, most frequent use in a commercial operation.

This size is appropriate for:

• Hotel kitchen central prep sinks: The largest sink in the operation, used for the heaviest items

• Catering operations: Where multiple service periods require continuous sink use at capacity

• Institutional dining: Schools, hospitals, and corporate dining where the sink sees hundreds of uses per day

• Banquet and events: Where the sink must process large volumes of pots, pans, and hotel pans between services

For procurement teams specifying a primary commercial sink, the 813×457mm dimension represents genuine commercial capacity — not a scaled-up residential sink.

SUS304 vs SUS316: Selecting the Right Grade

Why the Grade Choice Matters for Different Project Types

The BK-S3218 is available in both SUS304 and SUS316 — the grade selected at the time of inquiry based on the project environment:

The grade choice is particularly important for:

• Coastal hotel properties: Salt air accelerates surface degradation on lower grades

• Marine facilities: Direct salt water exposure requires 316-series material

• Buildings near swimming pools: Chlorine in indoor pool areas creates a corrosive environment

• Commercial kitchens using hard water: Mineral buildup accelerates surface degradation

Both grades accept the same brushed finish — a mixed specification (304 in standard areas, 316 in exposed areas) maintains visual consistency.

X-Channel Drainage for Large Bowl Capacity

Why Standard Drainage Geometry Falls Short in a Large Commercial Bowl

In a large single bowl, water at the far end of the basin can take significant time to reach a single-point drain — particularly when the bowl is loaded with cookware blocking the direct path. This creates standing water between uses, which becomes a hygiene concern and slows down the workflow between service periods.

The X-channel drainage system in the BK-S3218 addresses this by creating multiple drainage vectors from the basin corners to the central drain. Water finds a path to the drain regardless of where it sits in the 813×457mm bowl — reducing standing water time and keeping the sink ready for the next use cycle.

For commercial operations running continuous service, this drainage geometry makes a meaningful difference to throughput.

Triple-Mount: Installation Flexibility for Project Types

One Product, Three Installation Methods

The BK-S3218 supports undermount, topmount, and flush mount installation — providing flexibility across different bench materials and project types:

• Undermount: Stone and engineered stone benchtops — clean rim-free sight lines

• Topmount: Laminate benchtops and renovation projects — practical for existing cabinetry

• Flush mount: Solid surface benchtops — seamless counter integration

For project contractors managing multiple properties or different bench specifications within a single project, the triple-mount capability means the same model can be specified across all contexts — simplifying procurement and inventory.

16-Gauge Construction: Commercial Material Standards

Why Gauge Determines How the Sink Performs Over Time

At 16 gauge (approximately 1.5mm), the BK-S3218 meets commercial kitchen material specifications. The gauge of stainless steel directly affects:

• Rigid geometry: Thicker steel doesn’t flex when loaded with water and cookware — no drumming sound, no deformation over time

• Surface consistency: Thicker steel holds a consistent brushed finish through daily heavy use; thinner gauges develop surface irregularities

• Weld integrity: Thicker steel accepts welding without burn-through — more durable at the joints and corners

• Long-term appearance: Thicker stainless steel maintains its appearance longer in commercial use than residential-grade thin steel

For multi-unit hotel and commercial installations, the 16-gauge specification ensures the sinks perform consistently across all units with minimal maintenance callbacks.

Product Specifications

FAQ

Q: What is the difference between SUS304 and SUS316?
A: SUS316 contains molybdenum, which provides enhanced resistance to chloride-induced pitting and crevice corrosion. SUS304 is sufficient for standard commercial kitchen environments. SUS316 is recommended for coastal properties, marine facilities, swimming pool areas, and buildings with persistent salt-air or chlorine exposure.

Q: How does the X-channel drainage system work?
A: The basin bottom incorporates channel lines that converge at the central drain from multiple directions. Water can reach the drain from any position in the 813×457mm bowl without a direct unobstructed path — reducing standing water time significantly compared to single-point drainage in large bowls.

Q: What is triple-mount installation?
A: The same sink can be installed as undermount (below the counter), topmount (on top of the counter), or flush mount (level with the counter surface). This provides flexibility across different bench materials and aesthetic requirements.

Q: What certifications are available?
A: Watermark (Australia) and CUPC (North America) certifications are available. Confirm which is required for your project at the inquiry stage.

Q: What base cabinet size is required?
A: The 813×457mm dimensions require a minimum 85cm base cabinet. Confirm the cabinet interior dimensions and plumbing routing before ordering.