| 1 | Material transparency | Clearly identified copper, brass, stainless steel, elastomer and coating grades for every water-contacting component. | Applicable national drinking-water and material-contact requirements. | Material declarations, composition reports and independent laboratory test results. |
| 2 | Lead and heavy-metal control | Water-contacting parts meet the lead limits required in the destination market; for the United States, wetted surfaces are subject to a 0.25% weighted-average lead limit. | U.S. Safe Drinking Water Act Section 1417 and applicable local rules. | Valid third-party extraction, leaching or chemical-composition test reports. |
| 3 | Product compliance | Models are tested against the plumbing requirements of the target country rather than relying only on general factory declarations. | EN 817 for mechanical mixing valves; ASME A112.18.1/CSA B125.1 for applicable North American fittings. | Certificates, test scope, model numbers and certificate validity dates. |
| 4 | Pressure and leakage performance | Every production batch is checked for body leakage, cartridge sealing and connection integrity before shipment. | Applicable product standard and destination-market pressure-test requirements. | Routine inspection records, pressure-test parameters and nonconformance reports. |
| 5 | Dimensional consistency | Mounting holes, thread sizes, inlet spacing and hose connections match the approved technical drawing and local installation practice. | Relevant plumbing connection and installation specifications. | Controlled drawings, gauge records, first-article inspection and sample approval. |
| 6 | Corrosion and finish durability | The finish is selected for the installation environment and is tested for corrosion, adhesion and surface defects. | Relevant coating, plating and corrosion-test methods specified by the buyer or market. | Salt-spray or equivalent test reports, coating-process records and inspection standards. |
| 7 | Functional life testing | Cartridges, diverters and handles undergo cycle testing appropriate to the product type and intended use. | Applicable faucet performance standard and buyer-approved life-cycle protocol. | Cycle-test method, sample quantity, failure criteria and complete test results. |
| 8 | Quality management system | Documented incoming inspection, process control, final inspection, corrective action and traceability procedures. | ISO 9001 certification is a useful management-system indicator, but it does not replace product testing. | Current certificate, audit scope, control plan and batch traceability samples. |
| 9 | Export and packaging capability | Packaging protects polished surfaces and threaded connections during international transport, with labeling adapted to the destination market. | Buyer packaging specification, transport requirements and applicable customs documentation. | Packaging drawings, drop-test results where required, carton markings and inspection photos. |
| 10 | After-sales support and spare parts | Replacement cartridges, seals, aerators and installation parts remain available for the stated warranty period. | Written warranty terms and buyer-supplier service agreement. | Spare-parts list, response-time commitment, warranty exclusions and complaint-resolution records. |