Custom sinks

For stainless steel sinks, ensure the supplier uses SUS304 or SUS316 grade steel with a thickness of 16 to 18 gauge (1.2mm - 1.5mm) to prevent denting and noise. For stone or quartz composite sinks, verify a high resin-to-quartz ratio (typically 80/20) to ensure heat resistance and prevent cracking. Always request PVD coating or Nano-plating specifications if you require specific colors like gold or gunmetal to ensure long-term scratch resistance.

You must specify the drain hole diameter, which is typically 3.5 inches for US markets and 90mm for European markets. Ensure the supplier provides UPC (Uniform Plumbing Code) or CSA certified components if exporting to North America, or CE marking for the EU. Request technical drawings (CAD/BIM) to verify overflow hole placement and faucet hole drillings match your specific installation requirements.

Modern custom sinks often function as 'workstations.' Ensure the design includes integrated ledges for accessories like cutting boards, colanders, and roll-up drying racks. Specify R10 or R0 radius corners; while R0 (tight 90-degree corners) offers a modern look, R10 (slightly rounded) is much easier to clean and maintain, which is a major selling point for end-users.

High-quality sinks must feature heavy-duty sound guard padding covering at least 80% of the outer surface and a thick anti-condensation undercoating. This prevents noise from running water and protects the kitchen cabinet from moisture buildup and mold caused by temperature differences.

Sinks are prone to edge bending and surface scratching. Insist on 5-layer corrugated export cartons with molded foam (EPS) or honeycomb board protection on all six sides. For bulk LCL shipments, require palletization with corner protectors and shrink wrap. On Made-in-China.com, you can request suppliers to provide a drop test report to ensure packaging durability.

Focus on the mold fee (tooling cost) and sample lead times. Negotiate for the mold fee to be refunded once a certain order volume (e.g., 500 units) is reached. Always clarify the Incoterms (FOB vs. DDP) early, as sinks are heavy and volumetric weight can significantly impact your landed cost.

Utilize Secured Trading services on Made-in-China.com to ensure payment is only released upon confirmation of delivery. Hire a third-party inspection agency (like SGS or Intertek) to perform a 'During Production' or 'Pre-Shipment' inspection, specifically checking for surface flatness, welding smoothness, and salt spray test results to prevent rusting issues.

Be aware of Anti-dumping duties (AD) and Countervailing duties (CVD) that some countries (like the US) impose on stainless steel sinks from specific regions. Check your local HS Code (typically 732410 for stainless steel) against current tariff schedules to avoid unexpected costs at customs.