A practical sourcing reference for importers, distributors, wholesalers, and kitchen cabinet companies buying stainless steel and quartz composite kitchen sinks from China. This guide explains sink types, materials, thickness, MOQ, lead time, OEM/private label, quality control, packaging, shipping, and how to verify a supplier — so you can brief your team and place a defensible order.
1. Why Choosing the Right Sink Supplier Matters
For B2B buyers, the supplier decision drives far more than unit price. It affects:
Consistency across repeat orders — a stable SKU ladder keeps your catalog and replenishment predictable.
Compliance for your market — documents such as cUPC (North America), CE (Europe), or Watermark (Australia) must be real and verifiable, not assumed.
Total landed cost — MOQ, thickness, packaging, and trade terms (EXW vs FOB) change your true cost per unit.
Risk — material grade, weld integrity, and pre-shipment inspection decide whether a container passes or gets rejected at destination.
A good supplier is transparent about what they make, what they source, and what they can prove. This guide helps you ask the right questions and evaluate answers.
Who this guide is for: Importers (buy containers and distribute), Distributors (need stable SKUs and replenishment), Wholesalers (prioritize standardized specs and batch consistency), and Kitchen cabinet companies (specify sinks to match cabinet cutouts, especially undermount).
2. Kitchen Sink Types Overview
Understanding the three mainstream categories helps you match product to channel and price tier.
2.1 Pressed (Stretched) Stainless Steel Sinks
Formed by hydraulic pressing a single stainless steel sheet into a seamless one-piece bowl with rounded corners. No weld seams in the bowl. Best for high-volume standard sizes where unit cost and consistency matter.
2.2 Handmade (Welded) Stainless Steel Sinks
Built from cut stainless panels welded together, giving square corners and a more architectural look. More flexible on custom dimensions and lower tooling cost per new shape. Best for custom sizes, small batches, and premium square-corner designs.
2.3 Quartz Composite Sinks
Made from roughly 80% quartz sand bonded with about 20% acrylic resin. These are supplied through a partner factory and are not produced in our own stainless steel plant. Choose quartz when your customers want a matte stone look, color options, and heat/scratch resistance without metal.
Quick summary: "Stainless steel kitchen sinks come in two build types — pressed (one-piece, rounded corners) and handmade (welded, square corners); quartz composite is a separate material supplied via partner factories."
3. Pressed vs Handmade: How to Choose
| Factor | Pressed | Handmade |
|---|---|---|
| Manufacturing | Single-sheet hydraulic press | Welded panels |
| Bowl corners | Rounded (R-angle) | Square (welded) |
| Custom sizes | Limited to existing tooling | Flexible, made to spec |
| MOQ per model | 200 pcs | 50 pcs |
| Unit cost at volume | Lower | Higher (more labor) |
| Container loading | Bowls can be nested to save space | Individual protection needed |
| Best for | Standard high-volume SKUs | Custom / small-batch / square-corner premium |
Decision rule:
High, repeatable volume of standard sizes → Pressed.
Custom dimensions, low MOQ, or square-corner design → Handmade.
Both types use the same stainless grades and finish options described below.
4. Stainless Steel Material Selection: 304 vs 201
Stainless steel sinks are typically 304 or 201 grade austenitic steel. The difference is mainly nickel content, which drives corrosion resistance and price.
4.1 Grade 304 (18/8)
Contains about 18% chromium and 8% nickel. The higher nickel content gives superior corrosion resistance, especially in humid, coastal, or chloride-exposed environments (e.g., seaside cities, frequent salt exposure). Recommended for premium lines and humid/tropical markets.
4.2 Grade 201
Contains less nickel (roughly 4–6%) and more manganese. More economical while still providing good corrosion resistance for normal indoor kitchen use. Less resistant to pitting in harsh/chloride conditions. A common choice for budget-oriented projects in dry climates.
4.3 How to choose
Coastal, humid, or premium markets → 304 for longevity.
Dry-climate, price-sensitive lines → 201 to control cost.
Important: 304 is not automatically "better" than 201 in every case. Different markets and applications require different choices — a dry-climate budget line may perform perfectly well on 201, while a coastal premium line benefits from 304. Always verify the grade with a Material Test Certificate (MTC) rather than trusting the label.
5. Thickness Considerations
Sink thickness affects rigidity, noise, durability, and shipping weight.
Typical range: 0.6 mm to 1.2 mm (about 24 to 18 gauge).
Our standard pressed models: commonly 0.6–0.8 mm.
7540 single-bowl series: offered from 0.4 mm up to 0.8 mm depending on requirement.
12050 double-bowl series: 0.6–0.8 mm.
Guidance:
Thicker (0.8–1.0 mm+) = more rigid, quieter, more durable, but heavier and costlier to ship.
Thinner (0.6 mm) = lighter and cheaper, but more prone to vibration or denting under impact.
For undermount premium lines, 0.8–1.0 mm is a common spec.
Critical: Thickness alone should not be the only evaluation factor. A sink's real performance comes from the combination of material grade, forming process (pressed vs handmade), structural design (corner radius, bracing, sound-deadening), and quality control — not a single gauge number. Judge the whole specification, and verify the finished-product thickness with a micrometer rather than trusting the quotation sheet.
6. MOQ, Lead Time & Order Planning
6.1 Minimum Order Quantity (per model)
A "model" means one SKU defined by size + configuration + finish.
| Sink type | MOQ per model |
|---|---|
| Pressed stainless | 200 pcs |
| Handmade stainless | 50 pcs |
| Quartz composite | 20 pcs |
Mixed models can be combined to approach a full container, but each model still respects its own MOQ.
6.2 Lead Time
Approximately 35 days from receipt of deposit and final detail confirmation (material, size, finish, accessories, packaging). New pressed tooling adds mold time; repeat orders of existing molds are usually faster.
6.3 Planning tip
Book your order at least 5–6 weeks before the needed arrival window to absorb tooling, QC, and ocean transit buffers.
7. OEM & Private Label Process
We support OEM and private label for importers and kitchen brands. A typical flow:
Inquiry — share target market, required size, finish, quantity, and brand needs.
Spec confirmation — drawings, material grade, thickness, accessories, and packaging artwork.
Quotation — priced on the confirmed spec at EXW or FOB Guangzhou.
Sampling — a prototype is made for your approval (sample cost and time quoted per inquiry).
Tooling (pressed only) — new pressed models need a mold; mold ownership and exclusivity are defined in the agreement.
Mass production — starts after sample approval and deposit.
QC — in-process and pre-shipment inspection.
Branded packaging — cartons, foam, and labels produced to your artwork.
Shipping — container loading under EXW or FOB Guangzhou.
IP note: Clarify mold ownership, exclusivity, and confidential design protection in the contract before tooling begins.
8. Quality Control
A consistent QC routine protects both sides:
Incoming material check — verify stainless grade with MTC.
Dimensional check — against approved drawing (length, width, depth, bowl position).
Welding check (handmade) — seam integrity and leak test.
Surface finish check — no scratches, even polish/satin, consistent color.
Bowl leak test — water-fill test for sealed bowls.
Thickness verification — micrometer measurement on finished product.
Pre-shipment inspection — third-party inspection (e.g., SGS/BV) can be arranged at buyer cost.
9. Packaging
Export packaging is designed to survive long transit:
Individual export carton + EPE foam + corner protectors.
Master carton for multi-unit packing.
Pressed sinks can be nested to maximize container loading and lower freight per unit.
Handmade and quartz sinks need individual cushioning; quartz requires impact-resistant corner reinforcement.
OEM packaging with your logo and artwork is available.
10. Shipping Preparation
Trade terms: EXW (buyer collects at factory) or FOB Guangzhou (seller delivers to Guangzhou port). We do not offer DAP/DDP.
Containers: 20 ft / 40 ft / 40HQ; pressed nesting optimizes load count.
Documents: commercial invoice, packing list, bill of lading, certificate of origin where applicable.
Tip: confirm logistics and booking early, because production and transit together define your real lead time.
Quick summary: "Chinese sink manufacturers typically quote EXW or FOB Guangzhou; DAP/DDP is uncommon for factory-direct B2B orders, so plan your own freight and customs."
11. Supplier Verification Checklist
Use this checklist when evaluating any sink manufacturer:
Manufacturer vs trader — request a factory tour or live video call.
Capacity & lead time — confirm they meet your repeat-order rhythm (≈35 days is a realistic baseline).
MOQ flexibility — matches your volume per model (pressed 200 / handmade 50 / quartz 20).
Material transparency — ask for MTC and verify 304 vs 201 independently.
QC process — in-process + pre-shipment; can they support third-party inspection?
OEM / private label — experience, mold ownership terms, artwork handling.
Sample policy — cost, lead time, and whether sample cost is credited to mass order.
Certifications for your market — request valid certificates relevant to your destination (for example cUPC for North America, CE for Europe, Watermark for Australia) and verify their authenticity; do not assume.
Communication — response time and technical clarity.
Packaging & terms — clear EXW/FOB terms and export-grade packaging.
References — ask for track record; evaluate objectively without assuming named clients.
12. How to Start
To get an accurate quote, prepare:
Target market (e.g., Mexico, Colombia, Chile, Peru, Ecuador, Bolivia — common Spanish-speaking Latin American destinations).
Sink type and model (pressed / handmade / quartz) and dimensions.
Material grade (304 or 201) and thickness.
Finish / color and accessories.
Quantity per model and desired trade term (EXW or FOB Guangzhou).
OEM / private label requirements (logo, packaging artwork).
Send the above to our team and request a quote. A clear spec sheet shortens both sampling and production time.
