cUPC 50/50 Handmade Undermount Kitchen Sink in 304 Stainless Steel

Handmade Construction Process

Hand-Welded Corners

Unlike machine-stamped sinks pressed from a single sheet, the HD07946-10 is fabricated by hand-bending flat 304 stainless steel sheet into the basin shape and TIG-welding the corner seams. This process allows precise control over bowl depth, wall angle, and corner radius, which is not possible with stamping dies that fix these parameters at the factory. The welds are ground flush and blended into the brushed finish, producing corners that are visually continuous with the basin walls.

For OEM clients specifying private-label products, the handmade process accommodates custom bowl dimensions, non-standard depths, and modified deck layouts without the tooling investment that stamped production requires. This flexibility is particularly relevant for distributors serving regional markets with different cabinet standards, such as the 600mm European cabinet versus the 36-inch North American cabinet.

Corner Radius Options

Buyers can specify corner radius from five standard options: R0 (zero radius, sharp right angle), R10, R15, R19, and R25. Tighter radii (R0-R10) maximize bowl volume and present a contemporary aesthetic with clean geometric lines. Larger radii (R19-R25) ease cleaning by eliminating tight corners where residue collects, which matters in markets with stringent food safety inspection regimes.

The radius selection also affects tooling compatibility with accessories. Grid systems and colanders are manufactured to match the specified radius, so the corner radius should be confirmed before accessory orders are placed.

50/50 Equal Bowl Design

Symmetrical Workflow

The 50/50 configuration divides the sink into two equal basins, each with identical dimensions and depth. This symmetry supports parallel task processing: one bowl for soaking or washing, the other for rinsing or food preparation. Unlike 60/40 or 70/30 splits where the smaller bowl limits capacity, the equal split ensures neither side becomes a secondary basin.

For kitchen distributors and showroom buyers, the 50/50 layout appeals to customers who value symmetry in kitchen design and who do not want to compromise on either bowl’s functionality. The equal-bowl format also simplifies accessory specification, as both basins accept identical grid and strainer sizes.

Deep Basin Capacity

At 254mm (10 inches) deep, each basin accommodates large cookware including stock pots, baking sheets, and roasting pans. The depth reduces splash-back onto surrounding countertops and cabinetry, which is a practical concern in compact kitchen layouts common in European urban apartments and Southeast Asian condominiums. The basin walls extend the full depth without a false bottom, providing usable volume from rim to drain.

Material Authenticity

304 vs 201 Grade

The HD07946-10 is fabricated from genuine Type 304 stainless steel, not the 201 grade or 304-imitation alloys used in lower-cost production. Type 304 contains 8% nickel, which stabilizes the austenitic structure and provides corrosion resistance in wet environments. Type 201 contains only 1-1.5% nickel, substituted with manganese, which reduces cost but also reduces corrosion resistance, particularly in coastal or high-humidity markets.

For procurement managers evaluating supplier quotes, the material grade difference is verifiable through spectrometer testing or material test certificates. Xinhe provides MTC documentation with each shipment, and the 304 designation can be confirmed by any third-party inspection service using X-ray fluorescence (XRF) analysis.

Gauge and Thickness

The sink body uses 1.2mm (approximately 18 gauge) stainless steel sheet. This thickness provides rigidity under load, resists denting from dropped cookware, and supports the weight of water-filled basins without flexing. Thinner gauges (0.8mm or 20 gauge) produce a hollow sound when struck and may deform under thermal shock from boiling water. The 1.2mm thickness is standard across Xinhe’s handmade sink line and can be increased to 1.5mm for heavy-duty commercial specifications.

Anti-Condensation and Sound Management

Undercoating System

The exterior basin surfaces receive a spray-applied undercoating that absorbs condensation forming on the sink bottom when cold water meets warm, humid air. Without this barrier, condensation drips onto cabinet bases, causing swelling in particleboard cabinetry and promoting mold growth in the cabinet interior. The undercoating is applied after welding and grinding, covering all exterior surfaces including corner seams.

Soundproofing Pads

Five sound-dampening pads are adhered to the basin underside at locations determined by resonance testing. The pads are composed of a bitumen-based composite that absorbs vibration energy from water impact and dishware contact. In residential installations, this reduces the noise transmitted to adjacent living spaces. In light-commercial settings such as bed-and-breakfast kitchens or small café prep areas, the noise reduction contributes to a more comfortable working environment.

cUPC Certification and Warranty

The HD07946-10 carries cUPC certification, listed under the Uniform Plumbing Code for Canadian and U.S. plumbing installations. This certification is required for sink products sold through North American distribution channels and is frequently referenced in building code inspections. For European distribution, CE documentation is available. Australian WaterMark certification data can be provided for projects in Oceania.

Xinhe backs this handmade undermount sink with a 5-year warranty covering structural defects, weld integrity, and surface finish degradation under normal use conditions. After-sales support includes online technical assistance and replacement provisions for units that fail within the warranty period.

Customization Options

Dimensions

While the standard HD07946-10 measures 787×457×254mm (31×18×10 inches), Xinhe produces custom sizes for projects requiring non-standard cabinet fit. Common customizations include width adjustments for European 600mm cabinets, depth increases for commercial prep sinks, and basin ratio changes (60/40 or 70/30) for clients who prefer asymmetric layouts. Custom drawings are produced from project specifications within 5-7 business days, with sample production available for approval before bulk manufacturing.

Surface Finishes

The standard finish is brushed satin, which masks minor scratches from daily use and provides consistent appearance across the sink surface. Optional finishes include mirror polish for decorative applications, matte black PVD coating for contemporary kitchen designs, gun metal, gold, brass, rose gold, and white. PVD-coated finishes are available for OEM clients developing product lines with distinctive visual identities.

Project and Distribution Applications

This handmade undermount sink is specified across residential kitchen renovations, multi-unit residential developments, boutique hotel kitchen fit-outs, and light-commercial food preparation areas. Distributors serving kitchen showrooms stock the 50/50 configuration as a versatile option that suits both traditional and contemporary kitchen designs. For renovation contractors, the customizable dimensions and corner radius options allow the sink to be adapted to existing cabinet openings without modifying cabinetry.

OEM clients including private-label kitchen brands source the HD07946-10 as a base platform for branded product lines, specifying custom finishes, logo engraving, and accessory packages. Xinhe’s OEM/ODM capabilities include custom packaging design, barcode labeling, and documentation preparation for retail distribution.