| Common stainless steel grades | Type 304 and Type 316 are commonly referenced austenitic stainless steel grades. Typical composition ranges include 18–20% chromium and 8–10.5% nickel for 304; 16–18% chromium, 10–14% nickel, and 2–3% molybdenum for 316. | Confirm the specified grade and applicable material standard. Grade names alone do not establish the composition of every component in a finished faucet. |
| Corrosion resistance | Chromium contributes to stainless steel’s corrosion resistance. Molybdenum in 316 generally improves resistance to chloride-related corrosion compared with 304. | Performance depends on alloy, surface condition, water chemistry, cleaning products, and exposure. Salt-spray results should be evaluated against a stated test method and duration. |
| Product construction | A faucet assembly may include a body, spout, handle, cartridge, seals, aerator, and connecting components. Some products combine stainless steel parts with non-stainless components. | Request a component-level material declaration, especially for water-contact parts. “Stainless steel faucet” does not necessarily mean every internal part is stainless steel. |
| Forming and fabrication | Manufacturing methods may include stamping, bending, drawing, machining, welding, and assembly, depending on the design and component. | Ask how joints are formed and finished, and whether welds and surfaces receive inspection. The process varies by product design and factory capability. |
| Surface finishes | Common appearances include brushed, polished, and coated finishes. These describe surface treatments or appearance, not necessarily the base-metal grade. | Specify the finish sample, color tolerance, cleaning instructions, and test criteria. Coatings and decorative treatments can have different durability characteristics. |
| Cartridge and flow control | Single-handle faucets commonly use a cartridge to control temperature and flow. Aerators can shape the stream and influence flow rate. | Check cartridge specifications, replacement availability, operating-pressure range, and the flow rate declared for the intended market. |
| Water-contact compliance | NSF/ANSI/CAN 61 addresses health effects of drinking-water system components; NSF/ANSI/CAN 372 addresses lead content. Requirements depend on the destination market. | Verify the exact product, materials, and certification scope in the relevant certification listing. Do not assume that a factory or material certificate covers every model. |
| Plumbing performance standards | Examples include ASME A112.18.1/CSA B125.1 for plumbing supply fittings in North America and EN 817 for mechanical mixing valves in applicable European contexts. | Confirm the current edition and applicable national or regional requirements before production or import. A standard may not apply to every faucet type or market. |
| Quality-control checks | Relevant checks can include dimensional inspection, operating and leakage tests, finish inspection, and verification of supplied materials and components. | Agree on measurable acceptance criteria, sampling plans, test conditions, and documentation before placing an order. Inspection scope should match the product and destination market. |
| Supplier evaluation | Useful evaluation records include material declarations, technical drawings, test reports, compliance documents, and production inspection records. | Assess the specific manufacturing site and faucet model. Confirm that documents are current, traceable, and issued for the product being purchased. |
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