Quality Control – Ensuring Excellence in Every Piece
At Tangshan Houfengyuan, quality is our top priority. Every product, from ceramic toilets to washbasins and bidets, undergoes a rigorous quality control process to ensure consistency, durability, and compliance with international standards. Our commitment to quality guarantees that our B2B clients receive products they can trust for large-scale projects and international distribution.
Our 4-Stage Strict Inspection Protocol
Raw Material Selection & Chemical Testing
We source high-purity kaolin clay and premium glaze minerals. Each batch undergoes chemical composition analysis and particle size testing in our laboratory. The firing temperature is precisely controlled around 1280°C, ensuring high ceramic density and a water absorption rate below 0.5%, which helps prevent cracking and odor absorption over time.
Air-Tightness & Vacuum Leak Testing
Before glazing, each toilet body undergoes an automated vacuum leakage test. High-pressure air is injected into internal traps and water channels, and digital sensors detect microscopic pinholes or internal fissures. Any unit that does not pass is immediately removed and recorded to ensure only flawless products continue to the next stage.
Flushing Function & Surface Defect Inspection
After firing, each toilet is installed on our water testing rigs to verify flushing performance in accordance with US cUPC and European CE standards:
Ink & Flush Test
Inner rim coated with ink to confirm complete glaze coverage and full-surface rinsing with no blind spots.
Ball & Flow Test
Simulated waste test with solid plastic balls ensures efficient, clog-free waste removal with minimal water usage.
High-Standard Packaging & Drop Testing
For long-distance shipping, we use five-layer corrugated export cartons with custom high-density foam padding. Our packaging regularly passes ISTA International Drop Test Standards, ensuring products arrive at your warehouse or project site in perfect condition.
Global Certification Compliance
Our quality management system is certified under ISO9001. All products carry cUPC (North America), CE (Europe), SAI Global (Australia), and KS (South Korea) certifications. Inspection reports for each production batch are archived and available upon client request.
