Quality and certification
ISO 9001 quality management, a drinking-water hygiene licence and our own membrane testing laboratory.
Quality and certification
A standard for every step
We run a complete quality control system with SOPs and SIPs for every stage, an in-house membrane testing laboratory, and hygiene approvals for our full range of membrane elements.
- Quality management system
- GB/T 19001-2016 / ISO 9001:2015. Scope: production and sales of RO reverse osmosis membrane components. Certificate no. 76525Q0497R0S, valid until 30 June 2028, issued by SAQI (Shenzhen) Certification Testing Co., Ltd.
- Drinking-water hygiene licence
- Guangdong hygiene licence for products related to drinking water safety, covering CONGEXIN reverse osmosis membrane elements Ø40–200 mm × 180–1016 mm. Approval no. Yue Wei Shui Zi [2024]-12-S0017, valid until 15 January 2028, issued by the Health Commission of Guangdong Province.
- Membrane testing laboratory
- In-house laboratory that tests membrane element performance.
- Standard procedures
- Standard operating procedures (SOP) and standard inspection procedures (SIP) at every production stage.
Good water starts with a CONGEXIN membrane
Water purifier brands, equipment makers and distributors are welcome to ask about products, customisation and prices.



